Weird question about the monstrous mounts and there masteries. The griffon and the hippogrifs mastery is to reduce there fly speed by half with a rider on. Do they normally have a slower fly speed with a rider?
The slower fly speed is probably just a simplified adjustment rather than adjusting speed for encumbrance.
Yeah I found those blocks to be fairly odd myself. Having to wait till you are level 7 and have the appropriate feat to ride your companion in the air is incredibly strange to me. Especially since you could go snag a wild one or purchase one. Train it. And proceed to fly through the air no problem.
I realize it was probably an attempt at balancing it, but I feel it may be a bit too heavy handed. Level 5 would have been where I put it especially as this restriction wasn't in the prior versions of Sable Company Marines. Which are the ones I really care about.