Slow Movement ... a possible solution...
Check your Graphics Settings. The top listing is for your type of computer. If for whatever reason, it is *different* from what your computer is, it will have a negative effect on your performance.
In my case, I had been living with being a slow Lalafell. After trying many things, we noticed that the setting for my game was Standard (Laptop).
Which was odd. Because my machine is a desktop.
When we changed it to Standard (Desktop) the problem went away and I now move as fast as everyone else.
I don't know how that got defaulted to Laptop and I don't remember anything when loading up the game that said "check your graphics settings" before moving on.
So if you are moving slow - check that setting because that might be the problem.