2nd problem: How do you manage how fast each action is, and the order? In AD&D, all actions where chosen in the beggining of the round, not "on the go" as 3.x does. So, if you attack with a dagger, and the other guy casts a spell, you act first. If, whoever, the guy you was going to get was killed first/walked too far/whatever, and you wanted to change your action, you'd just add the new action's speed to your initiative (the bigger, the slower), meaning that you can't attack with a dagger, and then switch to an axe or spell to gain speed.
Unfortunatelly, that can be a bit frustrating after a while.