I've swapped to Squire over a few other mount mods that I had been trying & really like it overall.
However, I am seeing a problem with one mount, Headless Horseman's Mount. Whenever this gets used as a random mount, I can't re-click the macro to dismount (get the old error message 'you are already mounted').
The macro seems to update to use another mount as soon as I'm mounted. I have the option "Dismount if already mounted" checked.