Weapon abilities are a good idea in theory. There's a reason lots of 5e fans think that all fighters should have battlemaster abilities. But (as I posted in the other thread about Rush Attack) all weapon actions should involve a tradeoff.
E.g., -5 to hit (or disadvantage) for those weapon abilities that deal damage and impose a status effect. Possibly a larger negative and/or the enemy gets a ST to negate the effect if the status effect is very powerful.
But yes, these things should be Actions, and not bonus actions. Don't mess with the action economy unless you really understand the system.
