Zorya's got lovely paces and with a bit more practice and some lessons I'm sure they could become really accomplished.
I think a dressage saddle might help as Smem tends to ride quite short. Not quite as short as one of her friends who wants to become a jockey. The pics from holiday of Luti riding Ruby with ultra-short stirrups are hilarious. Talk about tom-tit on a rice pudding!
(for those of you unfamiliar with the expression it means something very little sitting on something very large!)