p41-ds: the cut is really good and the lower leg engineering is v similar to p37 with the darting and contour panels. this satisfies my desire for p37-ds i think. i find the cargo pockets much more usable and less noticeable when loaded than the p24a and p30a style pocket setup, but this is only because i have both types of pants. both types work well on their own. some pants only work well with hem zip closed, but these work well both ways.
p30a-e: the material is very nice to touch and i think overall the garment is lighter than the -ds version. initial impression after a few hours of wear is that these are noisier "crunchier" than the -ds version. the combination of lightweight + densely woven non-stretch fabric gives the feeling of being less breathable but i haven't gotten hot enough for it to be of concern so the breathability remains unknown. one note about the fabric is that because it is light and not stiff, the main cargo pockets are somewhat difficult to close single handed without the zipper collapsing/folding. this also happens on the -ds version, but the -s version (p24a) are relatively ok with single handed zipper closing.
i haven't handled any -e fabrics of the past so can't comment on past generations, but i like it enough to consider trying the p10 version of this fabric.
update: the -e fabric seems to have an affinity for cat hair. i just picked up my cat and the pants have become very furry. could just be the 'newness' time will tell.