It's very nice for riflemen to have a strong melee attack however gimping it so completely in close quarters like this is really just another disadvantage. What is the point of having a bayonette if you can't use it.
I think you would have a lot less people rushing corners with SMGs if riflemen could reload interrupt. I'll stand out there like a champ and send rounds down a hallway and the only time I stop is to reload. That's when some goon does a death charge into the room with a SMG.
It still makes absolutely no sense that you would sit in the corner and continually plug away with the bullets and not stab at the guy who just ran in the room.
Riflemen absolutely need this. It would really balance out close quarters for them, because right now, unless you know someone is coming for you, and you wait to reload, you're absolutely screwed.
I don't think anyone want that to turn into some call of duty run and stab strategy, the odds are still stacked well against you in this manner but it would infinitely help bolt action survivability in close quarters.
It's bad enough that auto and semi automatics make up a good 1/2 to 5/8ths of the players. But thats another topic entirely.