I'm a bowhunter, ex member of the UBP, have hunted with a crossbow, killed with a crossbow, currently hunt with a compound and longbow, and couldn't care less what anybody else shoots or hunts with. I don't like full inclusion for one reason and one reason alone: GREED. I don't want to share the woods with any more people than I have to. And here lately, between the treehuggers, the flower sniffers, the inline hunters, the junior and senior doe hunters, the horseback riders, and the geocachers, there's enough people in the woods screwing things up already.
That being said, I don't think full inclusion will have any harmful effects on the herd at all because the successful crossbow hunter harvests will offset the kill that would have happened in the firearms season. Time will tell.