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The TT folks would love it
If you're thinking UK, I'm not sure. First, on an ideal combination of course and conditions, one gear is enough. Certainly one ring has been enough for as long as I've been in the game. The jumps even as far as the 13-12 shift are well within the operating range of the rider, to the extent that inserting a mid-point into that 8% change is way more complexity than it's worth given the miniscule opportunity for improving biomechanical efficiency.
gbj_tester
Kimmo
TT is the market I envision driving eventual adoption of my idea. But the whole concept is predicated on being electronically shifted, where hopefully the bother disappears altogether.
It could be two separate shifting modes where if it doesn't half step it just minimises front shifts, or long-press to skip the half-step or vice versa.
Because there's only 2t difference in the big rings, it should be possible to make shifts between them almost as smooth as rear shifts, in two ways. First, since they're almost the same size they can be right next to each other, like cassette cogs. I verified this by putting all these rings on a crank with the aid of a 130/110 38t. Second, the 2t gap means it lines up every 180 degrees. With a bit of CAD shift magic, and perhaps a crank position sensor to time the shifts, I bet they could be super snappy and efficient.
The TT folks would love it, I bet. And surely the roadies could see the benefit when it comes to taking a pull on the front of a pack.