simple response i have some time to spend in theses days

Actual 3DGS features are not enought ? , or do you need some sepcial
feature , or some workflow (shader editor), more power ?

If you are in a game , just playing or prototyping , A6 is sufficient,
even some cool pro games can be made with it like some in showcase 2.

If you have a real serious team or if you are making a serious game,
if you have art , all primary ideas of your game than
if you need other things , power :
just consider another 3D package : open source or not !