If enough players keep referencing things they miss in BG3 to Solasta or other similar games, the devs can, and probably will, start reasoning, "well if you like that game so much why don't you go play that and leave us to do our game the way we want it."
I would think a game developer would be a tad more mature than an affronted ballerina. I'm sure they understand very well that it's beneficial for game devs to look at each other's creations and take lessons from that. Solasta can learn from BG3, too. And there's nothing wrong with helping to point out what it is exactly that works better in The Other Game - especially when there's so much overlap in both games' design goals (fun 5e video game, a living and breathing party...). On the other hand, I hardly expect anyone to point to Solasta and say "hey Larian! make BG3 more of a dungeon crawler". This is clearly not BG3's design goal.
Of course, this - as any feedback - should be provided in a constructive and polite manner, as you say.
