1. We'd like a way to share equal gold.
I'm gonna be honest, my friend was a short sword and I was a Great sword and I still had this problem. It wasn't a very severe problem, as we grinded so much that I had 46k and he had around 42k since I could wave clear much faster then him, but the point was it still happened. I thought, at first, that if I get 1 gold we both get 1 gold, if I get 2 gold we both get two gold type of thing. If that makes the game too easy, perhaps it should be split. 2 would be split between 2 people into 1 gold and 10 between 2 would be 5, but then you start getting into fractions and variables when you see a 3 gold between 4 people and the like so I believe the easiest way would just allow 1:1 ratio to all players with money, since it's not vastly important anyway.
All in all, I agree with this since it was a slight inconvenience during the early game when we had to go back and grind since I could afford outright all of my new equipment, and he couldn't.
2. We'd like to trade items, even if it's simply by dropping them on the ground
This just happened to me as an inconvenience to, what I believe, is my own bad luck. My friend and I grinded off Jumpkins and he ended up having 3 masks fly into him, both from his own kills and my own, because they would just drop on his character with no way of stopping it (He even dodged out of the way of one and it flew over 10 yards to jump into him).
Therefore, he actually stopped killing altogether, sat in the damn witches house until I got one for myself, which took for some ironic reason 20x longer then the other 3 dropped. What I'm trying to get at here is I agree with these points as even as a front line person, you can't control your surroundings and when an item drops within pick up range you are forced to grab it, even if you have 30 of them in the first place.