I think there is use and benefit of both, and none of straight up better then another. Larian uses 3D engine and takes an advantage of it, well worth dealing with some of it's frustrations.
Isn't what is to come in BG3 kind of both? DOS2 was a hybrid of isometric and 3D (though more isometric IMO). BG3 looks like the camera can come down even lower, giving more of a 3D feel when wanted. How locking the camera at distance and at a certain angle with no ability to rotate can be seen as better than this is perplexing.