Its all a matter of priorities. When Fulmer puts enough emphasis and attention on special teams then there will be results.
I have no problem with numerous coaches. On defense you have a DE coach, a DT coach, a LB coach, and a Secondary coach. Thats 4 coaches on defense alone.
On the offense you have a OL coach, RB coach, WR coach, QB coach, and a TE coach. 5 coaches involved. If they want to put numerous coaches on special teams, coaching different positions, to me it should help not hurt.
Same philosophy on offense and defense, one coach coaching 3 or 4 players but all of them coaching the collective team. It works fine. If you want to make an argument for a special teams coordinator, but having more coaches involved shouldn't hurt it should help.