I generally agree with the sentiment. Taking character control away from the player isn't a great or interesting mechanic, but in CoX there's only a few egregious uses of it. Most of the time if I got nailed it was my fault. Even in those cases it's generally when I'm playing at +x/x6 or more. Malta are pretty universally loathed, but sappers are minions. They're easy to pick off. They could maybe be a bit more recognizable since plucking the dude in black fatigues in an army of identical dudes can be a challenge. Nobody really complains about the basket of stun grenades that come behind the sap. It's almost exclusively the sappers that cause groans which is fairly understandable since it's one of the few mechanics that's almost impossible to build against (gotta love ELA for it though). An end-drain res/partial res in acrobatics could be potentially in-line ("Your focus on peak physical perfection has made you resistant to blah blah."). Probably still not worth a power pick but might make it more interesting.
Low/mid level CoT could probably be tuned a bit (fewer mages/demons - more hordelings), but late level are actually pretty fun. Longbow and arachnos could both use a bit of tuning. Longbow's penchant for -res and all the CC is a bit over the top. Arachnos' "all exotic damage, all the time" motto could be retuned a tick. Carnies are the only group that are a pretty hard "Nope." for me no matter the toon. -End, -recov, CC at the boss and LT level, -def. Pretty much any toon has something to dislike.