Welfmonk w/a spear (2 hands): 17 Dex, 15 Wis, 13 Con, 12 Str, Int / Cha 10 / 8
Much better is 16 Dex 16 Wis.
Monkotaur is a fun option if you want to be a strength based monk. It's worse than dex based wood elf, but it's an option if that is a thing you want to do.
In the early you game you get 1 more damage and 1 more in a secondary save for a trade of 2 AC, 1 initiative, 1 less in a primary save, and 1 less save DC for stunning strike. Then there is athletics vs acrobatics, stealth, perception, insight, etc.
It gets worse as the game progresses and you get ASIs.
Even if you are hitting 75% of the time that is only an extra 1.5 dmg/rd at level 5.
This in exchange for all of the above, and it gets worse when you have to choose between bumping strength for attack power or wisdom for defense and save DCs. The wood elf can happily boost dex and get attack power and AC among other things.
Now lets get into the rest of the things the race gets.
Wood elves get a free skill that is great, darkvision, 5 extra movement, and an enhanced hide ability.
What do minotaurs get? A bunch of abilities that compete with martial arts and flurry of blows.
It's not even close.
Even with 1d10 damage, if you counted the horns as simple melee weapons the monkotaur would still be far worse than other monks. There is no need to nerf the damage.