I have seen ideas like this a few times before, it's certainly a quick way to make Qwerty more logical in terms of the most common keys being in better places.
Take a look at layouts like Minimak, Asset, Norman, they try a similar approach.
The big drawback with this approach is that it doesn't improve bigrams. For example LO is common letter pair (in English), but is awkward to type quickly, especially as both keys are on the ring finger. DE is another awkward one. This is where a more comprehensively changed layouts (e.g. Colemak) shines: As well as optimizing key placements based on frequency, it also places huge emphasis on comfortable bigram typing, which makes your typing flow more comfortable.
I started out with similar approach: wanting a large benefit for small learning cost. But once you start getting into keyboard layout optimization, you tend to find you can never stay satisfied with only getting the job half done.
Good luck in your layout journey!