JaxSnaps

Why does the little, light 18-55/2.8-4 have IS and the hulking, heavy 16-55/2.8 NOT have IS? I have both lenses and the extra heft plus the lack of IS has the hulk staying home too often. I'm using an X-E2 (and, like many others, wishing for an E3). I may try out the "hulk" on an XPro2. Anyone comment on experience with that combo? IMO, Fuji messed up by making the best damn kit lens in the biz. Hard to beat. Cheers Jack