I'm all for removing charged attacks, however, PVP attacking and Parry. Will be the only loss here (but not really due to ping) as the short attacking speed will not be able to be parried by skill. It will be just straight up luck.
I'm very excited to see all the work you have done so far with dodge and parry. I think the next real steps are special attacks, ranged combat, and group/team healing/buff options.
I'm not sure how hard any of those are to code, but I think you have the core to most of it.
Like healing, it can't be too hard to change the code from food (or skill) effecting another player as you bandage them. It's the same function as "Heath Gain %" food.
This would allow for better group teaming on harder mutants. Teams are a lot of fun which also create activity.