The stamina bar on the mount is there for a reason. The combat bug remains unresolved after over a year. When I rapid a group sometimes that means I'm running from one side of the map to the other even after 5 minutes of no combat, same thing happens with transit shrines.
I can't see many classes being too upset about this other than sorcs and as a person who plays a sorc, I would much rather be able to mount and have our healers able to mount after using abilities they are required to use. I can see many healers that are forced to trail far behind a group when the group is under pressure to cross the map fast being very happy about this change. This simple solution will also allow you to not have to worry about allocating resources to tracking down the combat bug and focus on fixing lag, skill bar bugs, ability bugs and even more trivial matters that remain unfixed after a year like bank alphabetization.
“Whatever.”
-Unknown American