There was a clear and apparent difference in the way that MOV played Chun versus how Ricky played Chun. Even when MOV lost with Chun, it wasn't a complete blow out or him losing out matches because of some inherent weakness with the character.. they were close matches and he usually lost because of a bad guess/read or bad EX SBK (which he did a lot of).
Ricky just played mediocre/bad with Chun and clearly was not pushing the strength of the character as much as MOV was. Maybe Chun is indeed this terrible character that is totally not viable... but how can you really say that when you play Chun like that and then drop her? I can actually understand more if MOV drops her because it actually looks like he's pushing the character to the limits.
And this whole result oriented commentary on character strength is really getting irritating with such a small sample size. By this notion we should start asking for KBrad to switch characters because that Cammy isn't cutting it (1-6 in Eleague, almost G007ecks tier). Or start asking for Urien buffs because that character clearly hasn't done much in the tournament circuit. Or ask for Mika nerfs again because that character has been doing so much work. Hell Tokido did about as well as MOV, where are all the people demanding he switch characters too? People are just ASKING for another Sentinel/Nash type situation here.
Players can have bad tournaments even a bad season/stretch of months. Character strength isn't just restricted to performance of a tournament that happened a day ago, a week ago or even a month ago.