If you like problem solving and fixing things on the fly (but are also good at following and conversely throwing out instructions) you should be fine. Especially if you have a complete understanding of Plano, you should be golden, since aside from softlines and operational (ie 'around the store') you've already seen almost everything and know how to pick out what you need from a planogram.
signing was supposed to have the paygrade removed with, what, AE11? pr AE10? Not sure. It seems like maybe that was the case but the bump in pay was supposed to go away, but that would also depend on what position you were before (but it also seems like maybe they "forgot" to do that). Question though - if former signing spec position is now just signing TM position - are they then at the same paygrade as the ad prep, and setup/takedown team? at my store ad prep has a dedicated person, whose hours mostly completely fall under signing, however, the setup/takedown TMs don't get nearly close to 1/2 of their hours from that workcenter so probably not for them.