I have not read the whole thread but my guess, correct me if wrong, is that the ban / restriction to flavor is related to the traditional only-two-or-three classic flavours of medical products, with an extended hermeneutic criteria as to keep kids away from PVs, etc. Well, but then again, maybe; if this or similar is the case, you could use as an argument the fact that e-cigs will only work as a terapheutic approach or alternative to smoking if you can swap more than the basic flavors. Which is only true and very easy to demonstrate: Many of us only find our 'sweet' spot with exotic flavors and most of us are affected by the periods in which flavors dont appear so changes are neccesary.....
So, couldnt this reason be of a legal argumental basis?