Just out of curiosity why don't you shave the legs and face? Is that a breed thing because I've seen another horse on this forum that was shaved like that and it was a fell pony. I think it had very similar coloring too.
Whisper- they are clipped (most of the time only if they're worked in the winter) so they dry faster when they sweat in the winter. Long winter coats take forever to dry when horses sweat so it's just easier to clip them and then blanket them. And I think some people who show clip them in shedding season so they have a clean cut look for the shows.