It is evident that you are aware of the two dimensional nature of your tree and have wired all the newer branches orthogonal to that plane. Good, but this is sheer you are stuck = now what?
I struggled for a long time trying to identify why I liked the bonsai I liked. Most had three basic features in addition to an apex:
- a low branch on the left
- a low branch on the right
- The lower one is heavier/thicker
- They both come forward making a roughly 120-degree angle - reminiscent of grandma's open arms.
- a branch in back
- To produce a sense of depth.
Faking perspective is a key part of the game, so one wants branch 3 to be relatively thin and with shorter internodes. It helps to have this branch go nearly straight back as this will make the internodes seem shorter.
So, in offering you another way of approaching this, I think you should choose the view from the top of
this photo as the front. You have a heavy low branch on the right (in this photo, but which will be on the left when viewed from the front that I am suggesting). The one on the (to be) right is higher and lighter. Both already come forward as I would like to the suggested front. Presently, there is nothing to serve as branch 3, but don't worry about it for now because it could be grown (from a bus or a graft) later.
The elephant in the room, IMHO, is what is the rest of the trunk going to be (how does it get an apex)?
I see that it now has sort of a true segment with three or four shoots that you've wired up. Is this where you want it to be or do you envision a branch or branches here and the actual apex being higher? An alternative is that angle thing to the left (in the referenced photo). You could still force some more movement into it now and steer it into the trunk line you would like to see. Were this your choice, it might be best to get rid of the segment with 3 or 4 shoots now and face the music that the would will never 'heal' over --> simple solution is to have it face toward the back which is just a simple adjustment in positioning the front view.
Etc., etc., ...
It is always difficult to decide what you should do next when you have no idea where you are wanting to go.