I'm not too fussed with a pair of new longer TS-e lenses. The original TS-e lenses were better, the longer they were. The worse one was the TS-e 24mm L, which optically was the weakest of the bunch. The TS-e 45 and 90 were / are optically very good. When Canon realeased the new TS-e 17L and TS-e 24IIL, they created two stellar lenses and turned the tide of Canon weak wide lenses. Sure, there were a lot of new improvements too, like newer coating and a far better movement system (which allows tilt and shift in every possible combination at a flick of a switch). But the longer lenses don't need the same optical improvement, they are already very good. Sure, they could do with an improvement in their movement mechanism and newer coatings but I question the diffenence that a double in retail price will do to the final images. Sure a newer lens will be better, but probably not observable in the final photographic output. I have a TS-e 45mm and it's a very low use lens for me and not one I use THAT often...in fact I don't know anyone who makes a lot of use for this niche lens.
I just get a feeling that Canon look at their lens portfolio and someone noticed that these two old lenses stick out a bit as old and legacy.