Kasla's okay. It's just a little too on the nose for me: "So I heard you guys wanted a convoke commander" yes, okay, this commander is a convoke commander. There isn't really anything to exploit or puzzle out, though; you search up "o:convoke ci:wur game:paper" in scryfall, and then that's pretty much the deck.
I would have much rather seen a commander (without green in its colour identity) with some sort of 'implied convoke payout' that said something like "whenever you tap a creature outside of a combat phase do X" (scry 1? Surveil 1?).
Basically, I like that cards could be worded like
Vega, the Watcher, and be open to Foretell, but also be open to flashback, impulse draw (such as it is outside of red), cards on an adventure, future sight effects, etc., where it does
need to be a specific mechanic. As such, I will probably never build Kasla because it's not interesting enough.
Also, this is kind of just like
Inga and Esika a bit.