Not only is he not “buried deep on the roster” but - barring injury - he’ll have the highest snap percentage in the WR room.
Coleman is the closest thing the Bills have to a legit X. Nobody else on the roster can really fill that role. Hell, I’m not sure it’s a good spot for Coleman either, but he’s what we’ve got and they’re going to play him there at a high rate.
All these posters coming in (after a day or two of non-padded practice) saying that the best 3 WRs are Palmer, Moore and Shakir and they are the ones who should play think this is fantasy football. That’s a Z, a Z/slot hybrid and a slot. The only one of those guys who can possibly move to the X is Palmer and moving him there would diminish his contributions.
I don’t think many posters realize the massive difference in having to line up ON the LoS and getting to line up a couple of yards behind it.