It's not so much the pet scaling isn't great that Sup and Serv are not attractive enough. A dirty fix would be to increase the modifiers for destro (lesser extent affliction) for additional benefit on those two talents. Something ill expect we will see over the course of mop but not this teir. Don't forget any redress of pet scaling will cause a rebalance of dps tool kit, and I much prefer me doing the majority of damage while taking advantage of encounter mechanics to utilise the ultimate dot 'He who Plays All His Records Backwards'. IMO.
Add to that I would like see a minor sup buff for demo too, maybe related to wimps.