There will always be a meta, some way, some how. Even BLU has its own meta depending on the content (group or solo). I mean, can't you tell people to screw it even now? Just maining the Job you want? Just 3 skills from a vast pool of options will lead many to hunt for the best choices anyway.

Thing with "customizable" builds is that, sure, you can have fun with what you build. But it won't be enough to get a kill a minute early. Or it won't be enough to get a kill at all. I've no clue about Diablo 2 but in Diablo 3, if your build and set isn't among the S-Tier, good luck getting past 120 Greater Rift or something. Some builds were just hard-locked from better potential.