I personally like having to make non-ideal loadouts work at a higher level. I had to redo my Nyx set who I hadn't touched in years, for my run this week which I would never have even bothered with her otherwise, and it worked fine, I did well and while I had a couple small struggles it was nothing insurmountable. I don't think an endgame-oriented system asking that of players is unreasonable.
My only real "complaint" Is i think they should trim some of the lower end weapons that have no upgraded variants (Prime, Kuva, Incarnon, etc.) from the pool, they simply just do not hold up well at that level.