The trunk line has plenty of movement BUT no taper, so to make this a nicer tree it needs to be trunk chopped. Although it has been worked on for the time you say.
The work has been all wrong. So it needs to be corrected. Zelkova are usually styled in the broom, but they do not have to be, they do make nice informal as well.
This tree needs cutting back by at least half, then find a new leader and work from there.
Or if as you have said V cut for a broom!, if you do this you need a very straight trunk and good root flair. All other piece's can be used for cutting's.
Cheers

Pup