As I said in the poll thread, I don't see any point to making these requests here. The game has been in production since at least late 2017. Something as central to a game as its combat system and other similar core mechanics will have been among the very first things Larian decided on and set all the way back then. And I'm sure their choice was TB, based on the false "lesson" they've taken away from the sales success of D:OS2. And since then, I am sure they have also been porting over other systems directly from D:OS2, because they've been told by D:OS fans and reviewers those systems are "the best" ever created. This is why I have no doubt this game will be essentially a D:OS game (in terms of its look and feel and how it plays) but of course with a D&D coat of paint over it.
While I also believe that central gameplay elements such as the combat system were decided on a long time ago, I disagree with the notion that there's 'no point' for those who are interested in the game to express their hopes and/or wishes for the game. Pillars of Eternity 2 was initially released as a RTwP-only game and added an option to play the game in turn based mode approximately a year after its initial launch. If BG3 releases with only one option and there's a sufficient amount of requests for the other option, I don't see why a company with Larian's capabilities (and apparently also a major budget according to recent interviews) wouldn't be able to implement such a feature.