Some good stuff here!
(1) Use copper wire, or heavier gauge aluminum. Don't just use the wire to lay out the branches. Introduce random movement - up and down, left and right. Because the wire you are using is too thin for the task, you can't really bend the branch to your design, and it ends up looking like a straight sapling branch that was artificially bent down... versus an old gnarly branch on an old tree with lots of character.
(2) You are making lots of the correct decisions on your bar branches and your redundant branches, but you are making them too late. You want to eliminate them a little sooner, because otherwise you get knobs at the internodes and the trunk looks knobby instead of tapered.
(3) Before you start defoliating your tree to develop ramification, you need to ask yourself (a) is my trunk caliper where I want it and (b) are my primary branches good? You are getting some good caliper in the trunk and decent taper but your branches are probably too thick, and are in bad locations. With a tropical like this I would grow the trunk aggressively to develop caliper and taper, assuming that when you are happy with the trunk you will cut the branches off flush to the trunk and start branches anew. If you start defoliating too early, you are slowing down the growth and development of the tree to introduce ramification to branches that you are just going to cut off in the future.
(3) Because your tree is in early development, you don't really want it in a bonsai pot - even a plastic training pot. If you can't put it in the ground (because you live in an apartment, for example) put it in the widest container you can find that is still relatively shallow. You want the roots growing out, not down. You will turbo-charge your rate of growth and development.