I suspect so. I just placed my first order that included both pants and shirts, so will report back on whether it further delays things.
My guess is that adding a bit of length to the back rise (you've got to specify that they do it at the crotch, not the waist) would help. The half hip may help also, especially if it also feels a little tight across the front. If you have a little bit of a wedgie, also lowering the inseam would work.
In any case, aidanc is right, probably the best way of figuring this out is to take a few pic, send them to Luxire and they can tell you what they think should be changed (and by how much). Their feedback has been great for me.