I remember shooting lots of great images with the 30D and 28-135 ... even now, when looking back in the archives, that lens gave some great shots ... I think that zoom and a 16-35 would work well together -
It seems the build quality on the older lenses might have been better than the kit lenses of today - then, we jump to the 'L' build. It seems the older lens build was somewhere in between kit and 'L' of today. I shot over ten years with 30D / 28-135 combo and 100-400 v1, until moving to the 5DM3, 7D (Sold) and recently a 7D2 upgrade ... I'm less than happy with the 24-105 (it's a bit temperamental) , and hope this new 24-105 v2 fits the bill. It will sit perfectly between 16-35 and 70-200. Just enough overlap to lessen the number of lens changes in the field.
With a premium 24-105 v2, a very good outdoor kit would become 16-35, 24-105 v2, 100-400 v2, and could eliminate the 70-200 ... altho the 70-200 is such a great lens, would be difficult to leave it home unless the 24-104 v2 is stellar. <puzzled until reviews come in>