I like the idea of a list-building comp, but I think the Battleforce is too limited to offer you many options, even ignoring force org.
Assuming that you're playing standard missions, you will want as many scoring units as you can wring out of the box set. That makes 2 x 6 FW far more attractive (IMHO) than 1x12, or using some of them to be Pathfinders. I suppose you could convert one to be a Fireblade, but then you are restricted to one scoring unit, due to the min size.
The Piranha is a Piranha, and the stealth team is at minimum size, so the only options with those are what weapons / upgrades to give them. I think the setup you've chosen is what I would go for.
So the only areas where there are real choices are the drones (FA squadron, or spread between the units?) and the XV8s. As you would have loads of spare points otherwise it would be foolish not to make one of the suits a Commander. I personally think that loading him with a DC and an escort of marker drones like you have done is the best way forward for your army as a whole. I do reckon 4 drones will be enough though at this point value. Turn the spare 2 back into Gun Drones and use them to support the FWs or as ablative wounds for the Crisis Team.
So those are my opinions, for what they're worth. I would be really interested to hear what Oink would do with this new Battle Force, having seen the list he made out of the previous box set.