As I see it -
1. There's no point in using a TS-E lens without a tripod, so reducing the size & weight of a TS-E lens would be negligible.
2. There might be some IQ benefit, but TS-E lenses are a niche market, which I guess is why Canon didn't make any TS-E lenses for specifically for crop sensors. I've heard the 17mm TS-E lens was introduced to be a TS-E 24mm equivalent on crop sensors, but it's still FF compatible.
In short - if there's money in tilt-shift lenses for EOS-M bodies, Canon (or some other lens manufacturer) will probably make some. My guess is there isn't any, so there wouldn't be any.