My DD swings a 34/ -8 GA. It weighed in at 27.3 Oz. Just got a 34/ -9 Mantra but haven't had the opportunity to weigh it yet...but feels very similar the GA. As for end-load on the heavier drops of GDB and GA, yes they've moved the weighting down a tad. By that I mean minimally. There are no truly loaded FP composite bats out there other than the Rawlings Q-PRO end-load version. The only other truly end-loaded composite bats are all SP. By a true end-load I'm talking the same weight placemen/distribution as the Anderson RTs. Thus, no matter which weight the Ghost is, it is still considered a balanced bat even if they moved the weight down the barrel by an inch or so.For the Ghosts, the drop 10 and 11 is balanced but is heavier like you mentioned by 1-1.5oz’s. For the drop 8 and 9, they are end-loaded.
For most Louisville bats, they are typically 1oz over labeled weight. The Xeno’s are typically more than 1oz though.