It may be too hard to rebalance him into an attacker, plus they likely want to keep attacker slots for "face of the game" units like Lucia. However, Ice tank might be a really nice place to slide over that has a gen1 unit that could be replaced.
#Please, change s rank Watanabe's class and element
ocean cairn
I've seen others concerned that reworking animations and such might make this a no-go. I would imagine people are willing to overlook that in favor of better balance, and if they are willing to create new Ice SFX for him, they could keep the work on the current animation assets in a SFX coating for him to not waste the effort put into him already.
polar oriole
Ice tank would be a decent compromise, especially with Chrome being sig or bust post-Kaleido
lean storm
People should just wait for the announcement of the next characters and let Kuro cook, for all that we know we could get a whole Ice team next.
ocean cairn
nah, replacing mech when there are 4 gen 1s in meta is just a terrible decision no matter what they're cooking up