At 13"
Since I favor the 13" form, my wish that the 13" MBP at last live up to the moniker. It continues to get shorted in comparison to the 15" and 17" models, when more than a few would desire the same capability at the smaller size. In fairness, it may be that much closer now, but at a decided disadvantage without the graphics of its larger brethren.
On reflection, what I am probably looking for most closely resembles the current 13" MacBook Air in overall form, only with at least the capability of the current 13" MBP, and decent dedicated GPU.
To achieve that, as with the MBA, it is preferable if the optical drive is jettisoned. Hopefully the exclusion alone will allow enough more space for dedicated graphics, as well as increased battery life. The existing ports of the MBA would be fine as well, although inclusion of Thunderbolt, or retention if you will, would be good. The screen should be same specs as that of the MBA, but with better color gamut, as well as no-cost option of either glossy or matte. Retention of backlit keys would be fine. Then also, insofar as possible, less weight, too.
While wishing, something I would really like would be a no-cost, at least minimal cost, option of matte black color, the whole thing, head to toe.
Oh, and a little more attention to quality control. So everyone is puzzled at little to bitch about, but much to rave for. Although if trying to please everyone . . .