@jan Mato, do you want me to stick with what I have already done as a baseline? :S I don't know if you've started on the shorthand transliterator or would mind if I tinkered some more.
I am considering shifting most of the lines clockwise 15 degrees (a 1 o'clock-to-9 o'clock stroke and a 1 o'clock-to-7 o'clock stroke); this is because I have found the straight vertical stroke to be difficult to write with what I already know how to, and I have better control in the 3rd quadrant than I anticipated, and I have seen the angle of some of the strokes in third quadrant vary quite a lot in some Gregg writers' handwriting so that I know it would probably work to have several strokes in this quadrant. So it seems like a steep and a somewhat less steep stroke are more manageable than the ideal straight up-and-down vertical stroke in my opinion. In addition the 9 o'clock-to-3 o'clock stroke and the 10 o'clock-to-4 o'clock stroke will be shifted to become the 10 o'clock-to-4 o'clock stroke and the 11 o'clock-to-5 o'clock stroke respectively. The straight ascender will more or less stay the same, by which I mean it will not become the 9 o'clock-to-3 o'clock stroke, it will still ascend; its angle can be underspecified because there is only one straight stroke in the 1st quadrant. The curves in the 1st and 3rd quadrants will stay the same but there will be 2 sets of curves in the 4th quadrant.
I also looked at how it effects the blends and I think it makes them more distinguishable and thus acceptable, which can only help when writing. This is the primary advantage of this proposal.
I have also considered changing the entire orientation of the writing to be primarily up-to-down, and secondarily left-to-right. This would make it more akin to the ancient chinese grass script shorthand than the modern shorthands which are disproportionately influenced by European writing conventions. It also seems reasonable to do something different than the Gregg script, which I have noted has more descenders than ascenders; why not mix it up and make the writing flow in the same direction as the strokes? In addition, when I used the word connectors the writing was still quite strongly downward-shifting. The secondary designation is based on the ascenders being written in a rightward motion so that if writing should drift, they will drift in a rightward direction (in other words, I am saying that it's OK to let connected writing drift into another column; Teeline shorthand allows this for instance; the overall proportions of left and right-flowing symbols in the language will be matched to letters in the proportion that allows the writing to pretty closely follow the line of writing.) However, if the direction of the ascenders were written towards the left, the skew would be to the left, and the Asian order of primarily up-to-down, and secondarily right-to-left would be favored. In addition, I could use a straight vertical in place of the word-space; this would be intuitive because it would be the same as jumping to a new word but while never lifting the pencil and dragging it on the paper. Overall, I think this will have better results because the symbol inventory for mapping letters is skewed towards descenders; it still has to be born out with more practice writing. It could work a lot better than the current layout. I may or may not reassign the symbols to other letters.