This is a terrible layout
You should know that T and H are some of the most common letters and reaching your fingers to do them is so horrible
I still think colemak DH is the best for the amount of new keys you learn
Wow, that was a quick evaluation. Did you try it or just look at it? I think a lot of its advantages only become apparent when you try to use it.
You say you like the Colemak Mod-DH layout. Okay, let's look at that. Its documentation has a good section on its
changes from QWERTY. Ignoring the angle mod, it moves 19 keys; 7 which are "moved, same finger", 10 keys which are "moved, different finger", and 2 of which are "moved, different hand".
Compare that with QWERTY-Flip. It moves 14 keys, and all of those move in the same way. The 8 on the right are clearly "moved, same finger", and the 6 on the left could be used by the same finger since the stagger between the top and middle rows is only 0.25. Not only is that better than Colemak Mod-DH, but the changes are made in a uniform manner which means you can still use existing muscle memory - an advantage unique to this layout.
Regarding the locations of the T and H keys, I would argue that the 2 positions next to the resting positions of the index fingers on the middle row are very easy to hit, and this layout puts them next to each other to make the TH bigram a potential finger roll.
But anyway, going back to my original point, I think the only real way to evaluate a layout is to try it out. QWERTY-Flip optimises for ease of learning, and does it in a new way which I haven't seen done before. I hope people take some time to evaluate it properly.