Allies getting XP for helping?
I think this is a very important rule for early on. The first few fights can be very difficult until you can get better equipment, but in our games, we usually help just for that experience point, because it helps us get those green dice faster.
Allowing to trade during combat?
We've never done this. I'd forgotten that you could. We very rarely trade dice at all.
Not dying for taking wounds?
This would only serve to eliminate players from the game. I guess there's nothing wrong with that, but in this game, I don't miss the player elimination aspect.
Running away from monsters with no penalty?
I'm not sure what penalty would be appropriate. Losing gear would be brutal early game. Taking a wound would remove the benefit of running away.
All in all, I think these aspects of the game work well. I really enjoy this game and I've played it with several different groups. None of them have had any complaints except for the vast number of symbols to memorize, and I've only heard that complaint once.