Remember when people wondering why Tokido said he will main Ken ONLY?
Because Tokido was right all along.
Just check all those patches, there is only one character who's strong from the beginning of season 1 and still being very strong without nerf (maybe minus nerf but that was nothing imo) to the latest patch in season 2. And that very character is Ken.
When Tokido said he won't main Akuma, and he will continue grinding Ken skills, some people think he's crazy. Turns out, his big brain is already ahead of ours at that very time.