You can speed that up, if you go to project settings and input, the move forward/right will have a scale value which will be 1, change that to 2 or whatever you want. You can do the same with the LookUp and LookRight inputs too. Although Im not sure if the look axis are slow because of camera lag in the pawn.
Also, as a general rule it would be better to multiply the scale value in your pawn rather than in settings, incase other things are using those inputs, the way I mentioned is just easier to do and explain.
Whichever method works best for you though