Not much more you should be doing, but there's benefits you'll take advantage of.
You'll get the Grandmaster's crystal every 2 weeks instead of a PHC (I think? I've been Uncollected for awhile.) The Daily crystals are better. You'll be able to waste your units on the Uncollected Featured (you shouldn't but you could).
As far as content, I really think it's just the Uncollected monthly event, which is something you should attempt to slowly build a 6* crystal and T5basics.
Either way, congrats. That Collector is a B of a fight.
Comments
You'll get the Grandmaster's crystal every 2 weeks instead of a PHC (I think? I've been Uncollected for awhile.) The Daily crystals are better. You'll be able to waste your units on the Uncollected Featured (you shouldn't but you could).
As far as content, I really think it's just the Uncollected monthly event, which is something you should attempt to slowly build a 6* crystal and T5basics.
Either way, congrats. That Collector is a B of a fight.