There isn't really a distinction between being queued and being played because being queued is the same thing as being played in the future. We could say re-queue instead of replay though? 

The track can't get replayed until it is back in the pool so it makes sense to me to call this the minimum time until a track is replayed/requeued. Or at least I think it would be clearer to a first time user than "Track ignore time". 

RE: name length. We already have preference names like "Re-queue tracks in AutoDJ". I don't think this is too long. When this all moves into its own preference dialog they will have more room to breathe.