This is something that I've seen come up on discord once in awhile but less so on the forums. I'm doing it as a feedback thread and not a suggestion thread because even though I have opinions I thought it would be more interesting to get the community's opinions as well since mine are often wrong. From a labor perspective, I don't know how much extra work maintaining/balancing a class like Weavemaster is if it's left mostly alone so I'll let a staff member chime in on that front if they feel it's worth discussing.
From a player perspective, I'm of the belief that Weavemaster could probably be reintroduced into the current environment and be okay but not great. Blastlocks are cracked compared to the Demon/Devil/Fey days, infinicasting Invokers are far more versatile I'd argue than the Trueflames of old that they replaced for the most part, and even many of the vancians now have refund mechanics that mix up their pve resource management in ways that just didn't exist back in the time of Weavemasters (and that's before touching on other resource augments like Spellbound Wands). On top of this, the minion nerfs have left minions produced via spells (as opposed to epic feats) in... Well they're just not the same concern they were back when undead spam was able to chew through the server with ease (I'm aware some are still fine but the ac alone is a shadow of what it once was). I think if anything they'd be sort of middle of the pack or even slightly lackluster on most fronts besides maybe providing party buffs and so in my opinion they wouldn't be overly disruptive to reintroduce as an option in the way that Kensai managed to be even after it was locked.