The notion that Control is somehow a liability is baffling. Every control Primary has a an AOE hold that can be slotted with the Lockdown: Chance for +2 mag proc. On my Plant/time this is locking down groups with ease. Seeds of Confusions requires multiple applications to stick but mobs survive long enough for seeds to still be a factor. There's also Carrion creepers. They're doing the same work they always do.
Knockdown is still as potent a control tool as it always has been, So fire, Ice, and Earth have tools that can be effective CC. Darkness control might have to work to get CC, but everything in dark comes with -tohit debuffs, including the pets, which are helpful. I'd need to Gravity and Mind people to weigh in as I don't have experience with them, but think Think Detention field would be really strong