I think you are exaggerating about DA:I. You will have enough points to unlock main quests without grinding. I'm not sure because I'm from those rare players who enjoys doing all quests and explore every corner of the world as well as gathering all things that can be gathered

And I hope BioWare will stick to this path with a lot of content. But I understand your point of view that you don't like when game is "forcing" you to do something. I see you would prefer to lock content with level requirement like in Wild Hunt. Well I think it's just matter of taste. One way or another game is restricting players freedom.
Man, you're really bent on bitching about TW3 in this thread, huh? Well, you can stop - it's off topic. We don't like soap-boxing etc. etc. Look it up. This is the last informal warning you get, as this is behaviour that you keep repeating on the forum and have been warned against numerous times already.
Anyway, official moderator business out of the way, I would be pretty upset if level requirement was actually used to force grinding, but that was not the case in TW3, it was more of a way to guide you as to the order in which to do the the Main Quests - in TW1 and TW2, they used Chapters to hard-lock that order (the enemies and quests in those chapters also have set levels, it's just not displayed like in TW3), in TW3, they soft-lock it via a level requirement, due to the open world. It is the same principle.
So, that's fine by me, personally. I would be ok with this approach in Andromeda, if the balancing is right.
The problem with the Power point requirement is that you can use those points to unlock other content aside form the main quests. So, if I want to unlock a certain area, because it includes a part of a companion's side quest, I need to invest points in it, but in order to get those points back, so I can unlock a main quest, I must grind some other content I did not want to do. So, what this amounts to is having to grind, basically. There is no reason to gate main quest content in this way, aside from forced grinding.
Hopefully, I've explained to you the obvious difference between the standard levelling system in RPGs vs. cookie-clicker-like content-gating behind grind walls and we can move on
For some reason the first thing that came to mind when I read that was procedural generation - probably because of No Man's Sky - but I hope I am wrong about that.
Yeah, it's not very clear how they plan to achieve it, could be procedural generation. To be honest, as long as there's enough solid content that's hand-made, allowing players to explore every planet could be cool, as long as it's kept optional. Personally, what I'm thinking is they want to combine the planet probing from ME2 with planet exploration from ME1, maybe to gather crafting materials etc.
We'll just have to wait for more information, I guess.