There are a few things I want to clarify, hope now is not too late to reply.
We can assume for pretty much certain that Solas' plans, whatever they are, are based on the best intentions for elves (whichever subgroup of elves he considers to be his people, at any rate). We know this from "The People, they need me" and from the dev notes "In his drive to save the People, he will kill anyone, even Mythal" [they were something like that anyway]. He's definitely on the side of whoever he considers to be The People.
...If he's planning on releasing the gods back to the world, it may not be the best thing for modern elves at all, because they will once again be beholden to a group of powerful beings who, from certain Codex entries and dialogues, can certainly be interpreted as feudal tyrants who have abused their power, may be [in the case of some] genuinely Blighted/corrupted/insane...To trade shem oppressors for ******* overlords.. that's not for me.
I'm of the opinion that a shift of power for elves in Thedas should come around as a result of such things as Briala holding power of Gaspard and an elven Inquisitor acting as an ambassador for elvenkind and a beacon for elves across Thedas.
I think that if his plans were so un-grey/un-problematic he wouldn't have had to have left to carry them out on his own.
I see the popular speculation now is that Solas would sacrifice himself to release the sealed elven gods and then hope for the best. Regardless of what the other gods are truly like (the current info is incomplete for insightful understandings, though I picture them to be more like Azura and not Molag bal, but whatever), I personally do not think that is his intention. Solas said the following line after the ToM when the inquisitor said she wanted to share her power of the well:
" you must not let false modesty allow you to pass your power to someone else. There are few regrets sharper than watching fools squander what you sacrificed to achieve."
That, plus the dev notes "In his drive to save the People, he will kill anyone, even Mythal", make me seriously doubt he will just start something and not see it through this time. If I were him, instead of releasing the other gods, I would want to absorb their power and make myself God No.1, so I don't have to rely on them, especially when they maybe volatile.
The above is nothing more than my own speculation, but let's say this is his plan, is it something he could share with a friend he met for a couple of months? I think not, although I still think he could have probed the attitude of an elven inquisitor.
(And just for argument sake, if all of the sealed elven gods are tyrants who cared about nothing but adulation and Solas did release them?
1. If these gods accept worships from every race, then they will probably turn to the biggest population available to gain adulation, namely the humans. So they will not remain as “elven” gods and will not do anything specifically for elves.
2. If these gods accept only worships from elves, then they must deal with the largely weakened and mortal modern elves living within and in the gaps of human spheres. In this case they need a lot more than the desire to dominate to gain adulation, because at this point even trying to kill all humans will not deliver the elves back to where they were, whats done cannot be undone. Thus being just “tyrants who cared about nothing but adulation” will get these elven gods nowhere, and in turn will get the elves nothing. (Unless the situation changes these elven gods as it did Solas, and forces them to work on their more constructive qualities and work together.)
3. If these gods accept only worships from immortal elves. Considering how many immortal elves are possibly left, this is just sad. Perhaps the gods could divide their essences (or may not even need to) and merge with the immortal elves, and then they can live happily as gods in flesh ever after.
4. If these gods do not accept any currently available races and want to create a new type of people. Then they are, again, not “elven” gods anymore.
So I don’t see how releasing a few powerful “just tyrants” will be constructive, and I doubt Solas intends for an ineffective solution for a problem he values so greatly. )
About having Briala holding power of Gaspard and an elven Inquisitor acting as an ambassador, I think these are meaningful achievements but not necessarily effective toward rising the status of elves. Take Briala as an example, firstly, the evidences she held are unlikely to bind Gaspard for life; secondly, "drastic" reforms would not help her to stay in power (or may even backfire) as both Gaspard and nobles in general are, in fact, against her. Similarly, an elven inquisitor would probably be seen as a "special" foreigner well versed in human affairs. The respect and understandings the elven inquisitor received are unlikely to be transformed into respect and understandings for all dalish elves.
Currently, with the limited info about what Solas may want to achieve, I think I share his perspective at least partially and I am sympathetic toward his cause. I thus see him as on the friendly side (ie we are on the same side). I do not know of his method and his plan. Will I approve of them and let my inquisitor Levallen follow them? May or may not, depending on what they are. That being said, I see methods as revisable and sides not so much. Even if his plan ends up being something I disapprove of, doesn't mean I won't want to "help" him in some ways. Helping and following blindly are not the same thing.