Do you guys actually think that Larian is doing ANY type of mechanic changes that are not authorized by WoTC? That Larian has somehow taken WoTC's intellectual property and just ran with it and are doing whatever they want? How do you know WoTC doesn't ALREADY have a consultant there discussing mechanics? Did it ever cross your mind that MAYBE WOTC is utilizing Solasta as the game for hardcore D&D players, and they want to utilize BG3 as a way to introduce people not familiar, or are not big D&D players into their playerbase?
That doesn't really change anything though. If true, it just shifts our unhappiness to include WotC in addition to Larian. I don't care what WotC declares if the result is worse gameplay. [insert "the council has made a stupid-ass decision" meme]
The ease of losing concentration due to surfaces is a bad gameplay decision that makes combat and spellcasters much more frustrating to play. The high ground Advantage (instead of nothing or a flat bonus) makes a lot of spells and abilities useless and makes having low-ground so incredibly punishing. The lack of ability to move concentration spells like Moonbeam while wildshaped is a huge nerf to the druid that takes away one of their main abilities and makes wildshape so much less useful in combat. The ability for all classes to use scrolls and the availability of bonus action disengage&hide makes all classes feel more similar.
If WotC has explicitly approved of all of these things (as opposed to the more likely scenario where they've just given Larian blanket permission to make changes of this scale), then they obviously also have a problem with understanding what makes D&D combat and class individuality fun.
