i think it's fair to look at the stats and think cryo is an incredible player, because truly he does have good aim. but also look at this way, what does cryo have to offer? aim. aim is not hard to find, i'm sure there are plenty of talented prospects who offer that along with the ability to be a proper functional duelist. i think your idea of dropping zander for a duelist to shift with cryo and moving asuna to flex is viable, but it could also lead to the same problems happening all over again.
yeah cryo's probably the best iso and he actually is in my opinion the best jett in americas as well. but here comes another problem, neither iso nor jett are actual meta picks. and those 2 are also the only agents cryo can actually play well. keeping cryo imo is just not good for the team. the one situation where they COULD keep cryo is dropping boostio, moving cryo to full-time senti and zander could pickup igling. but this is a risk because even if its fun to shit on boostio for his god awful performances, he's a tested igl who has won champs. and for what it's worth, at his peak boostio is extremely talented.
i really just think the best course of action is to drop cryo for a good duelist and try getting potter somehow.