good question as to why they never allowed us to customize mount. Customize loadouts, gear the mount wears and adding mount battle would be very welcomed.
I say, if the reason for not doing these things is because the engine is old and it cannot be done then i say its time for a new engine.
They need to step up their game, it still has longevity and potential but only if it gets with the times.
I agree that Blizzard have to step up their game. Customizing your character is as important to me as improving my ilvl. And if anything Transmog showed that it is quite popular. I bet the same will be with mounts. We have what achievement now 500? That is a lot of mounts to customize. Iād love it.