I dont mind slow movement while fighting cause that makes it so enemies are a threat, so you can balance it as a war of atrition instead of one shoots which is good, at the same time I think people, myself included, like to move a little bit quicker if they are traversing the world, in both safe areas and while looking for enemies or going through a dungeon.

If the plan is to have mounts then you can maybe ignore the above, though I think town places where you cant deploy a mount, should give a slight movement boost, cause the least time people spend in places like that, the more natural it feels.