Unresponsive UI - no dev tag

[Aistaraina]

Also noticeable lag with skill and ability execution

Most likely the same reason behind the lag in everything else.

It currently is:
- You input an action.
- You send action to server.
- The server tells everyone else, including yourself. <-- BAD. JUST BAD.

When it should be:
- You input an action.
- You do your action.
- You send action to server.
- Server tells everyone else.

The number one rule in game development is give the player immediate feedback when they do something. SE broke this very important rule.