Interesting thread.
I'd love to see the EMRII streamlined a bit, to more of a bastid child of the EMR and a 4800 HighCamp
Keep the same dimensions of the HC 4800ci main bag, to build off of.
Ditch the lower access horizontal zipper, in favor of a full length vertical front zipper, ala EMRII.
Keep the Pals webbing inside the bag, and keep common loops for hanging bladder & small pocket at top.
Add zippered wing pockets on both sides of bag, same as the EMRII, but skip the slide in pockets. (basically, long pockets sewn into sides of the HC bag)
Ditch the fixed, clip style compression straps of the EMRII
Keep the K-hook loop attachments of the HC bag, and add the same type loops where the permanent HC k-hook straps are sewn into the bag.
IE, make the existing permanent K-hook straps of the HC bag, removable. By adding loops where the straps were sewn in on the HC bag, the end user can add/remove straps as needed.
Include 6 k-hook straps to work off these loops, for compression, securing gear underneath the bag, securing the lid, etc. (Don't like too many clips & straps danglin' everywhere. I'd rather have the modular ability to add/remove them, as needed)
Just thinkin' out louc!