I vote pull. If you do it sooner than later, your horse won't have had to deal with the problems that COULD arrise. Its not a big deal to get them pulled, just ask your vet to do next time he's getting his teeth floated, in my ecperience they don't charge anything extra for wolves teeth (at least my vets don't).
Its like wisdom teeth, is the closest human example I can think of
Having horses means: There is always hay in your bra. And you're never quite certain on how it got there. You realize that you just clucked at the dog