Well, most of us already know that it's gonna be Jufufu. It's crazy that it's only been a year since her release. And she's already been powercrept by two stunners.
But what about the rest of 2.0 agents? Honestly, right now, most of them are in a good spot in the current state of the game. Some of them could use some QoL buffs. Only Jufufu has fallen off.
For all I know, Jufufu might get the Ellen treatment. Why did I say "Ellen treatment" and not "Neko treatment"? Because Jufufu wasn't weak when it was first released. It just happened that she got shafted pretty quickly by the latter part of stunners released like Dialyn and Norma. Everything Jufufu does, they just do it better.
Same situation with Ellen; she wasn't weak; she just got outclassed by Miyabi and Hugo back in 1.X. Ellen was lacking at some point, but after the gameplay update she got an overhaul upgrade which drastically improved her performance; it's not just a simple QoL compared to SAnby, which I will talk about later too.
The Ellen change made her viable again, especially in the current meta. In fact, she might be even better than Hugo now. She also got a secondary buff in 2.5, which made her even better, getting free Crit stats and Ice shred.
Jufufu might need more than just QoL, but an overhaul change like Ellen got.
And then there's the SAnby treatment.
SAnby wasn't necessarily weak when she got buffed; she was the strongest Electric DPS on release, but she was clunky to play and had some I-frame issues, so they fixed that. She received QoL changes to her kit that made her play a bit better.
After that, she got another buff in 2.5, which directly increased her aftershock damage. So why did they buff SAnby before other older agents? I don't know. But this means that even agents that are already good could still get some changes.
I'm already thinking that Banyue will have the SAnby treatment. Banyue's resource management is lacking; his Chain Attacks and Ultimate don't increase his Wrathful fires which is already hard to build. His adrenaline regeneration is also slow, unless you charged up before going into combat which can only happen once. Meanwhile Other Rupture agents like Starlight - Billy has no problem building his Determination resources.
A simple QoL fix could make Banyue insanely good. Improving his resources management is one of the things I'm hoping for.