Okay, let's say the feat gives you 1d4 for unarmed and 1d6 for imp. weapons. What's nearly always the better choice now? Why not just increase versatility instead of make light weapons pointless?
Oh, I do see the mechanical issues if you make the improvised weapons too strong. I also realize that you want a brawler to be good with his fists. In short, I understand why the feat is as it is. I'm just thinking that if I were sitting at a bar and I was going to hit someone in the face, doing it with the glass mug I'm holding might seem a better choice than my knuckles. Or maybe slamming a chair over someone's back would have some smallish benefit over punching. But at the moment, it's all bludgeoning.
But don't get me wrong, I'm not complaining. Heck, I don't even have a house rule in mind at the moment. Maybe I won't, and I'll just leave it up to style and fun (which it totally is!). On the other hand, if I can find some small flavorful way to distinguish between the different approaches, I might. Though in the end it might just end up being situational and I'll figure it out as a DM in the moment.
Shrug. I'm just brainstorming at the moment.
AD