I wouldn't call those changes minor.
Player who wish to customize their characters more than through buying abiltiies are forced to use crafting. Spend their time hunting for resources throughout the game, buying schematics, looking for schematics. All of that can be a collosal waste of time for those who hate MMO farming. It is an artifical way of making the game longer without adding meaningful content.
The 8 abilities restriction has the capacity to be extremely annoying to players who like to play tacticly and want to use their builds to their full potential. Of course it mainly strikes mages. You will very likely have 8 active abilties by level 8/9. While it is very likely that an average players will reach about level 20 for endgame, perhaps even higher. Can you imagine how infuriating it can be when you have mages in your party and you see a fire resistant enemy and you want to swap your fire spells for frost spells because you want to use them at their best potential while keeping the "mandatory"(read it with irony) spirit spells? Then you swap back? Then another resistant enemy shows up and you swap again, or you want to use traps or ice or fire walls. All the swapping will be infuriating.
Those things affect gameplay all the time. Those restrictions make no sense unless BioWare wants to infuriate people and force them to make the cookie-cutter builds and spent half of their playtime farming for crafting.
All of those things limit the player, "idiot-proof" the game and brings it in line with average hack&slash. Because, unless you haven't noticed, those things are typical for hack&slash like Diablo.
Gonna go by paragraph:
1: Crafting is an essential part if you want to min / max in inquisition or create bizzare builds otherwise you should be able to utilize looted equipment which the evidence points to being hand placed so no rng to worry about. Crafting materials you pick up are abundant everywhere or have specific areas so you know where to find them. Bear pelts for example hopefully drop every-time you kill one. The last sentence is your opinion as i and probably a lot of other people love crafting systems and this looks to be the best I've used(loved it in skyrim despite the grinding).
2. The game is built around the 8 ability limit if these were the origins or even da:2 skill trees i'd have a big problem with it. Even at level 30 you will find it hard to reach more than 10-11 abilities if you take full advantage of upgrades and passives, some of the extra actives are hopefully super useful versus certain enemies. On the other hand i wouldn't be against having all our actives available in combat its just a non issue with me at the moment. The last point i would rather didn't happen, factions should be rather consistent with their vulnerabilities and resistances also you have 3 other members to eliminate any weaknesses in your character build if need be.
3. This is just speculation, it could prove correct but i doubt it judging by the info on customization and gameplay we've seen where crafting materials are abundant along quest paths.
4. Also speculation maybe if there was no tactical camera and it was a solo game and we were at the mercy of rnjesus i'd agree but on the current information its a massive tactical party based rpg with an in depth story that has meaningful choices. I recommend watching some of bioware's twitch streams and then tell me if the combat looks anything like a hack and slash.