Hey Jarrod, hope your well.
Great topic, it has certainly generated a lot of interest/feedback, which I'm sure was what you intended as well as how to make trees better and to foresee styling issues in the future.
I just wanted to add my

,bearing in mind my very limited experience.
On a side note, I have noticed that a few of you said you would rather see this tree in leaf before commenting, does this not defeat the purpose of creating fine twigs? I believe most of the major shows in Japan are held during winter because they wish to show of the hard wok they have put into growing and shaping the trees. The ramification and form of a deciduous tree in winter should be something to behold.
I think that this tree is styled for when it is leaf. I do agree with your inciteful critique of the tree apart from the point about a few irregular branches in the apex, because they, in my opinion have probably been positioned to fill the canopy/apex out when the tree is in leaf (so it wouldn't be seen).
In a perfect world a deciduous bonsai would look great either in leaf or when dorment, and there probably are examples of that.
Sure, a deciduous tree in winter is something to behold, and as you said the major shows in Japan are winter shows, but does that mean you shouldn't style a deciduous tree solely for when it is in leaf, and not for the winter view.
I realise that the tree in question is a Maple and not an English Elm, however the English Elm is a good example because if you go the for the winter view with many twigs and lovely fine ramification, the tree will most likely look a little big for the pot and bulky when in full leaf. Due to the fact that the leaves a borne on a horizontal plane. Therefore the leaves at the side of the canopy protrude and as a result adding visual mass/width to the over all image of the tree (very well ramified Eng Elms that is).
This also occurs at the apex (leaves are horizontal), which can mean that they lack dimension which is highlighted on a tree with much ramification.
And conversely, if you style it with the summer-in leaf view in mind, even with adequate ramification it will still look a little bare in winter due to the previous point.
Sure this is a subtle difference, but still it is significant and it suggests to me that it is possible to style a deciduous tree favouring either winter or when in leaf as the ideal display time, as either way you will have to make a comprimise...especially if you are going to display it in a show/competition.
Even though not all species bare their leaves on a horizontal plane, I think that there are subltle differences that should be taken into account and why it is a good idea to know what design you are shooting for with deciduous trees when considerering their intended optimum viewing/display season.
If you except my point??? I don't think that going for the in-leaf view is defeating the purpose of taking advantage of of the fine twigy ramification that is especially evident in winter, because trees should be enjoyed year round. So why not have two deciduous trees of the same species designed for both in-leaf and out-of-leaf views, so that you can learn more about them and their quirks, as well as having a tree that will always highlight the particular season at hand so that the species can be enjoyed at its best throughout the entire year.
Just a thought, that makes sense to me and why I think this tree is meant to be displayed at its optimum time when in leaf.
Please let me know if you think I am way off the mark as I have much to learn.
Cheers, Dario.
