Please go back and read my OP and response to your OP, hopefully you will notice that I never said anything about forcing these changes but that they are goals my Inquisitor would work towards in pursuit of his greater good.
I did read your OP, hence why I asked the questions you still have yet to answer. Your goal is significant social changes at institutional levels: that only comes from an ability to enforce your views (the position of leader of the Inquisition), to convince people to change them (ideological change), or a mixture of both.
But you have laid out no ideology or reason why people should embrace those changes. You have described what you want people to do, but not why they should agree why they should adopt your view. Which, if achieving them is your goal, leaves enforcing them and preventing them from defying you.
Of course, if not achieving them is acceptable, not changing people's views and not forcing them to change their actions will simply mean you are impotent and will fail.
As to what I want, I don't want to make Thedas' societies better only freer.
Where is the virtue about a freer society if it's worse? Somalia is very free: a libertarian paradise free from government coercion, really. It also is one of the worst places in the world to live.
There's still the point about an ideology of individual freedom chaffing at the idea of having restrictions imposed on that individual freedom: who are you to say what I can or can not do even if it affects others? That's imposing limits on my freedoms.
Now on how to get there, The mage-templar war is going on and the inquisition may need to settle that dispute in the course of acheiving its mission. If that is the case my inquisitor would try to achieve as much of my stated goal of mage self-determination as possible during the course of perfoming his duties. Also there is a possible elven rebellion in conjuction with the Orlesian civil war which may allow for the realizing of some my stated goal of ending the de jure oppression of elves. The goal of ending the de jure dwarven caste system is likely unachievable, at least by my Inquisitor but if an opportunity presents itself he would try to affect that particular change.
If a goal is a voluntary side-quest, it's not a goal: it's a preference.
What you're describing here is simply partaking a preference if the opportunity arises- though maybe not, if the opportunity itself relies on some other compromise of values.
There's a label for people like that, and it's fair-weather reformer.