Since the O-Horses don't move when dismounted they can't come when you call them, they just move half a block and stop again. I think there should be a config to let horses roam freely when dismounted and a config to use the default horse GUI would be nice too since many mods interact with that :)

Sure, I think can do that. :)
I can't do the vanilla GUI (it would crash due to how my horses work) but I can do the ground tie option.

Sure, I think can do that. :) I can't do the vanilla GUI (it would crash due to how my horses work) but I can do the ground tie option.

Thanks :)

Now added in 2.1! No ETA on release