Yes but the skills output increases at every tier. So you can still use skills even if your not running a full 6 set. The only thing that’s really changing is having max skill damage and near max weapons damage at the same time.
This should have never been possible to begin with, any division 1 veteran could tell you this.
Pretty much. Now truly dedicated skill builds will indeed require 6/6 gear pieces to be veered towards skills. How they further boost specific skills remains to be seen, but it makes every piece important to add - or a serious sacrifice (depending on the desired build).