That's because RF-S lenses are being made deliberately small (and lousy, at least on the outside). I guess Canon definitely doesn't want anyone to stay with RF-S for very long before switching to the better (and more $$$) full-frame lenses, and presumably cameras. Case in point: the leaked 10-18/4.5-6.3 lens, versus the quite good and proportional looking 11-22/4-5.6, which, while by no means a harbinger of light, seemed like a better balanced effort.
That's why I'm not holding my breath for any RF-S gear that is not absolutely low-end. There were photos around of the 22/2 STM pancake in RF-S guise, but nothing became of it just yet, although re-engineering it into an RF-S lens would've been a no-brainer (and not much effort). The 32/1.4... let's just say it would be a pity to see a decent lens like that go to waste in the end. To think that once Canon did give us things like the 17-55/2.8 IS...
That's why I'm not holding my breath for any RF-S gear that is not absolutely low-end. There were photos around of the 22/2 STM pancake in RF-S guise, but nothing became of it just yet, although re-engineering it into an RF-S lens would've been a no-brainer (and not much effort). The 32/1.4... let's just say it would be a pity to see a decent lens like that go to waste in the end. To think that once Canon did give us things like the 17-55/2.8 IS...