Originally Posted by Taril
No, I dismissed because you have no proof that they are directly related to EA itself.

It is merely speculative that they are related to EA.

They are definately EA related, since Larian actively tied the changes to the requests made in their community update posts. For example, this is a Patch 9 EA phrasing:

Quote
Patch #9 is our final major update before our August 2023 launch as we put the finishing touches on BG3. This community-inspired update is a direct response to your feedback, and brings some of your most requested features and changes to Baldur’s Gate 3. We’ve boosted the level cap, revamped our Reactions System.

Originally Posted by Taril
This EA system is not only made up of player data. It is also an extended development. Like, we literally know this. Act 1 alone had the same amount of active development time as Acts 2 and 3 combined.

Had they not done EA and put this extended development, they might have spent a more even amount of time on each act of the game (Thus, spending more time on Acts 2 and 3, allowiing more improvements to occur)

Of course, there's also the question of just how helpful player data might be, especially depending on your opinions/viewpoints (Like, player data lead to the changes to companions. Considered by some to be a negative change)

Have Larian not made the extensive changes to the EA build of the game, they would lose an opportunity to gather additional big data on the yet (to that point) untested implementations. So there is that point to be made here, apart from the one disproven above.