She really is, the core idea of the dodge tank is great and feels really rewarding when you get to pull it off. The problem is that she has practically zero damage early, especially without Fandom levels. Zero fandom Zeta is almost unplayable on harder levels because it takes you till level five minimum to get the modest damage boost and crit boost her skills give. Even with full Fandom you have to rush your first collab, almost at the expense of healing/defense/speed, or else you get hard gated the second an enemy healer shows up because she can't kill them natively. The cooldowns on her cloak abilities are so long you can't reliably dive high value targets with them either, it's even odds that you need it 15 seconds later and get blown away.which is a shame shes fun.
Tbh it does make for more engaging gameplay overall though. Most characters are incredibly strong by comparison to Zeta so it's a great feeling to finish your build and dance through hordes of enemies untouched. I'd honestly bet she's one of the better characters for Hardcore because of her core survivability, but I haven't really felt like opening that can of worms yet.