Yes. Same problem with hand xbow and 2 feats. one with bonus attack and one with -5/+10. I would not want to nerf it too hard though, as until you are sitting at 20 Str it is not too problematic.
I am just not sure how to nerf it in a way that makes it still worthwhile.
-5/+10 only once per turn, and not on a bonus action attack.