TwoSix
Everyone's literal second-favorite poster
The chance for any one attack, especially an improvised attack with Str mod damage by an archer, to kill an enemy is pretty small. If they can't disengage, they pull out a melee backup weapon and do a real attack.I suppose my visual was more about using the bow as an improvised melee weapon to take down an opponent near you before you shoot or something, like we see in movies when it is better for the archer to attack with the bow in melee as they move out of range of the enemy's attack.
The weird behavior you speak of would be very strange since if they moved into melee to attack with their ranged weapon on their bonus action, they are now either engaged in melee and have disadvantage on ranged shot or must disengage to move away.
To me disengaging, dodging, etc. are too strong and steps on the toes of rogues and monks when done as bonus actions. Allowing the bonus action to be an attack when the style allows you to disengage is the same issue as with defensive style and dodging as the main action.
I am trying to come up with things that are useful, but not available elsewhere. For example, I would love Dueling to use your reaction to parry, but there is already a feat for that... to me that is the biggest issue in striking balance, not repeating features available elsewhere, etc.
I think the primary sticking point here is that, to me, if the option you add doesn't make the style stronger, why would you add it? It's impossible to add an option that's both useful and balance neutral. Having options A and B is always better than just A, unless B is has absolutely no use.