I also didn't enjoy riding horses all the time just to get the Flower of Oblivions when I tried to get a T10. Took me about a week 1 try. Of course it's faster if the PC is permanently on, but who wants that, you're often stuck anyway...
So I spent most of my time riding horses instead of playing the game. I didn't spend any money on the game during that time either, not sure if PA wants that...
However, I don't like the idea of a worker training the horses. If you want to get the horse, you should make some effort.
I would like to see the following changes:
1. Add a daily quest which requires us to level up a horse (t6-t8) by 1 lvl in order to get Flower of Oblivions as a reward. More flowers depending of your trainer level (not just 1 more for guru please).
(That would actually make your freshly caught lvl 2 potato t6 usefull :)
2. Reduce the horse spawntime to 10 minutes.
3. Let us trade Hunter's Seals (from bosses, scrolls) for Extra Mount EXP Scrolls.
4. Buff Extra Mount EXP Scrolls :)
5. Buff pets which give horse exp a bit.
6. Add a slot to the riding crop. Add a crystal for the riding crop which increases the horse exp while ACTIVELY riding. No autopathing! Only working for horses below lvl 30.
The crystal can be exchanged for Imperial Training Seals (50?)
A Aditional Quest is a good idea :)
The problem of horseriding being boring and useless still exists though
-More Mount XP doesnt solve the problem because ure still stuck doing nothing
-Riding active in circles is even worse than riding autopath i think (though i like the crystal idea)
There has to be a system thats rewarding if you do it active
For example horses that are used on a wagon while trading items could get lots of xp for that. this way you can still do something productive while being active and not just run in circles for hours.
The horse Races could also come back (only with the change that you run with your own horse) maybe even against npc oponents if not enough players are doing it and with doing the races it could be a fun way to earn active mount xp :)