I don’t have any problems with threat unless someone’s going ham on one or two mobs that I haven’t done anything to but cleave, but a quick taunt takes care of that.
Sounds to me like OP’s tank needs a lesson in how to play their toon. As long as nobody’s doing more than 350% of the tank’s DPS to a mob, they shouldn’t be losing threat. If a tank can’t manage to do even 40% of the top DPS’s damage through the course of a fight, they’re either doing something wrong or you popped a ton of CDs on trash.
EDIT: Just saw this was for low levels. Yeah, if you’re having problems at low levels just chill out and wait a few seconds. You’re not running M+. There’s no timer, so relax. If you’re that worried about leveling quickly go buy a boost.