I agree on the high end EF-S lenses. The most blatant omission at the moment is in the telephoto range. A competitor to Sigmas 50-150 HSM OS springs to mind, or a telephoto prime in the 200-500 range with the weight reduction advantage of EF-S. (not as probable though)
Releasing one such lens would also reinforce the marketing of 7D2 as a sports/wildlife camera...
I'd suggest that Canon is deliberately yielding the lower-cost long glass market to third parties that are targeting the xxD and xxxD owners who may not realize the high demands upon glass that come with such high density sensors.
For the camp who predicts that the 7D2 will truly be a "mid-level" camera (meaning priced near the midpoint between a rebel and a 1DX), the expression "Future of Pro APS-C will change" means that the 7D2 will be a serious sports/wildlife Body. Such a camera could be evidence of a Canon strategy for serious/pro APS-C wildlifers to either rent or own the long L glass that meets the build quality, resolution, and weather sealing requirements of such a use case, as the reach/cost advantage is already realized in the form of the crop sensor itself.
The increased demands of the higher density sensor would be incentive enough, for those who are aware and who care, to use L glass, knowing that they are taking advantage of the best portion of the image circle as well.
If the 7D2 really targets the pro or semi-pro wildlife segment, then in my opinion Canon may assume that the 7D2 owner has a FF body as well (such as a 6D), or aspires to one, in which case there is no incentive to invest in EF-S glass at all. Moreover, accepting the wildlife specialized use case, the "single body" 7D2 owner may in fact be content with covering the WA and UWA ranges without L build quality and weather sealing, i.e. with the fine lenses available today such as the 10-22.