There is another plus of the crop sensors, which unfortunately is lost in Canon because Canon does not make good lenses for their crop cameras. Crop sensors don't require all that glass.
Even as a very critical Canon client, I think you are mistaken. Canon has the best APS-C lens range in the market from 10mm to 250mm focal range with a sufficient number of *excellent and affordable* EF-S lenses. IQ-wise, some of these are optically right up there with the best L lenses and most of them are actually "dirt cheap" relative to their performance and competitive offerings ... Fuji X, Sony E including the "Zeiss"-labeled stuff and any and all Nikon DX lenses.
Unless you belong to those, who prefer to buy a 56/1.2 lens for a grand for use on an APS-C sensor only, rather than putting that grand towards an FF-sensored camera and much cheaper f/1.4 or f/1.8 glass for even better IQ, DOF, bokeh and photographic capability.
And if those EF-S lenses are not good enough for you ... well guess what, all EF lenses, L and Non-L work absolutely flawlessly on any Canon EOS DSLR, including those with APS-C sensors.
Specifically I would like to mention the following winners in the EF-S range:
* EF-S 17-55/2.8 IS
* EF-S 10-22/3.5-4.5
* EF-S 60/2.8 Macro
* EF-S 24/2.8 STM pancake [probably, not used it myself yet]
* EF-S 18-135/3.5-5.6 IS STM
* EF-S 55-250/4.5-5.6 IS STM
* EF-S 15-85/3.5-5.6 IS
* EF-S 10-18/4.5-5.6 IS STM
best APS-C kit lens on the market at rock bottom price
* EF-S 18-55/3.5-5.6 IS STM
The only thing lacking in the Canon APS-C department for some years now is a sensor as good as or better than competitive offerings. Unfortunately 7D II disappoints in terms of IQ improvements, otherwise I'd buy one.