For all the posts about 8" and 12" letters, tails, weenies, or flags, the fact still remains that without the icons, there is no way to discern between a rook P51, a Bish P51, and a Knight P51 (except that the rook P51 will be diving in from 47,000 feet and losing it's ceramic heat shields along the way
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The reason AvA works is you all leave a particular location and head to enemy territory where you will encounter ENEMY. Then you can distinguish friendly from foe in the ensuing battle because you are respectively flying planes from one country or another. As I understand it a US P51 does not encounter or engage a "German" P51. You either fly Allied Aircraft or Axis Aircraft and you shoot down whichever one your aren't.
I would dare say (admittedly without any scientific proof or Rasmusen Polling) "no icons" would interest fewer players than "full icons". And, removing said icons would be more detrimental to the player base than leaving them. However, that having been said, if your 'cup-of-tea' is to play without icons than you already have that option in the AvA arena. If you are only concerned with those who share a like mind for the "no icons" and are not looking to change the player base (as I read in one post above), then the solution is right in front of you. Go to the AvA and all those who WANT to play without ICONS can do so in that arena. If in fact, that arena never gets more than a few persons, then that should answer your original post.... people are not 'generally' interested in flying with "no icons". If that arena does fill up with like minded players, then you also have an answer and have the solution you were asking for.
So, the point of this post is simply that what you want is already there! Just go with it. If you don't get interest, then there isn't much interest in the original post and it would be wrong to force the vast majority of players to 'have to play' (your way) with no icons.