This looks like the winning reason for the swap, people cried on the forums and twitter that they were getting a flying mount they couldn't fly in draenor with from the raiding achieve, so they made it a ground mount like the BRF mount.
Pretty sad they did that, but at the same time better in the long run, after a few months of 6.2 being out everyone and their cousin will get the glory mount, but the apexis mount will be for people who actually took the time to farm it.