I use toe out on my warbirds and it's very helpfull. Toe in can have the effect of wanting to allow the plane to roll over onto its wing tip. With toe out it self centers and levels itself out. When you turn while going a little too fast the plane will have less tendency to tip over with toe out.
I would rather have toe out than toe in and if it's minor then just leave it as is with a little toe out.

Also toe in or out will induce a little bit of braking due to drag from tire scrub but toe out is better because it won't cause the plane to hop and squirm as bad as toe in.