Given how important horses are to the early-mid game, I find it kind of distressing that there are no horse spawn points until you get right up to the edge of the maelstrom zone. When you’re still in your 20s/30s and having to cover significant distances to get to Wild Surges or harvest materials that don’t spawn anywhere near water (or much of anything else) like Brimstone, most of the way to the center of the map and back is a long way to run for a foal. And that’s only if somebody tells you that’s where they spawn!
My suggestion: The middle-height meadows all over the west side of the island all have mostly-useless dear and baby-dear spawns. If you replaced every third dear spawn on the west side of the island with a horse/foal spawn, it would really smooth out progression through early-mid levels.