In my opinion it’s not that bad, the amount of useable purple gear stays nearly the same as it was in BL2, so if you now find a x25 stagecouch that’s like you’ve found a 14.x firerate elemental anarchist in BL2. In BL-Universe purples and the rarity colors are for picking stuff on story-mode without thinking to much about it. Endgame-wise they lack a unique effect their counterparts (unique/legendaries) have, thats why only thouse shine which have a pseudo unique effect (stagecouche has the ability to have a x25 pellet count shooting in a straight line, variations of T.K’s Wave can have the same pellet count). The purple hyperion shotgun might be usable, but has better legendary brothers/sisters. Proton-Rifle (Maliwan) is a good choice, but gets outclassed by the complex-root. That said, purples are only noticed when their legendary counterpart has kinda annoying effect you like to avoid.
In conclusion, as everybody should have noticed, GBX weapon system is/always was a rng-toolbox with some rules. I read a article on BL2 section how rarity gets rng’d that discribed it very well.
A gun is made of a body , barrel, …
The dice roll and choose the body (manufacturer).
Than they roll again and choose the barrel, thats the point where the game decides if you get a purple or a legendary weapon, the rest of the parts like grip, foregrip, shaft, magazine are only on little impact.
So when you get a purple, the game only wanted you to say, that you weren’t lucky enough for picking the legendary.
Back to topic, there are more legendaries out there, because every kind of base-purple has at least one legendary upgrade version. Sometimes even more (I think since DLCs, bevore it should be 50/50)
Endgame-Wise the purples would be useable if their barrel-part gets buffed, but as in other articles around the discussion-board thats kinda balancing problem, every time GBX touches it, it gets even worse. So lets enjoy thouse purple ones (that are OP because of trying to balance around Mayham) on story walkthrough (where legendaries aren’t droping like rain, so you might have better chances being not lucky enough) and lets ∆∆∆\grind for the power-creep gear introduced in extended content for meta-endgame-builds.