I am not sure it is rushing BG3 but it does feel like shortcuts are taken, to make it easier/for budget reasons. The focus so far from what I noticed is pretty much on the Origin characters and their personal story, rather than adapting the 5e ruleset properly/better, or to build an engine from scratch.

Having played DOS2 after playing BG3 as well, I did notice that for all the clunky mechanics and things DOS2 had.. somehow BG3 made them feel even clunkier. Right now, rather than BG3 being Early Access it almost feels more like a big Tech Demo to me.