While i agree that the BLM rotation overall is fairly simple to learn(fire spells for damage, switch to ice to replenish mana, try to keep thunder dot going) while giving plenty of opportunity to improve(where to stand, when to buff, what to dodge versus shield through, stutter stepping), the keybinds are still fairly extensive. In end game content im using roughly 25 binds between damage(single target and aoe), buffs(my opener uses as many as 8 of these), and survival skills(sprint, teleport, and shields) - plus im counting these off from memory, so its possible im forgetting a couple. And thats with a handful of other situational abilities assigned but rarely used(either primarily useful when level synced down or only useful for solo play). The minimum for level 60 would probly be 15 keys(fire 1 3 4 bliz 3 4 thunder 1 3 swift eno ley quell rage transpose plus 2 aoes), and thats losing some practically vital skills to get your keys down.

I havent counted the binds for the other classes, but isnt bard a few less keys then some of the others? One of the healers might be fairly low as well(AST maybe? - speculation).

Best of luck finding something that fits your style!