Apart from the differences probably not being enough to promote swapping one more key for in my opinion (I don't use any H shortcuts all that much so for me that bit wouldn't be a problem at least):
https://forum.colemak.com/viewtopic.php?id=128
As you can see, this is language dependent. In Spanish/Portuguese and French (the latin languages - I suppose this would include Italian as well), the H is notably less frequent whereas the difference is less in English (7.3% vs. 4.8%) and German. However, in no syllabus I've seen has the H come out on top of the N which kinda defeats your point maybe?
Furthermore, I find that remappping frequently used keys to their neighborhood can be frustrating particularly in the early learning process. The S key is one of the most troublesome keys for new learners judging from what Colemak acolytes have posted about.
There's also the potential for a digraph issue (apart from TH which I agree would be somewhat improved). Whenever someone thinks up a key swap, Shai usually has thought it through and presents a few important digraphs that would get messed up. Let's see if he has anything in store this time. :) On the other hand, TH and HE are among the most common digraphs in English. Even counting digraphs including white space the H does very well and the N is less notable. I still don't think that should be enough to promote your proposed change over.
Last edited by DreymaR (16-Dec-2007 11:39:29)