Looking over the outline you have provided I can think of a few issues but one obvious one for a start. Say I have a hand with 5 hearts and a 4 card minor that wants to look for slam if there is a fit but otherwise stop in 3NT. So I respond 2♦ and Opener rebids 2♥. Now if I try 2♠ to check for the minor fit and hear 3♥ I cannot look for the heart fit. Alternatively if I bid 3♥ over 2♥ I have lost the minor. Playing transfers with second round transfers we can respond 2♦ followed by 2♠ (for clubs) or 3♣ (for diamonds) and find the fit in either suit at the 3 level. There are biggers problems if we also open 1NT offshape and the standard issues, although I think these tend to be overblown, of having the balanced hand describe to the unbalanced one. But in truth I would need to test it for a bit and add more details before making a proper appraisal. As a (very much) non-expert I will not break your record either way though.
