Make icons a pre-flight selectable value. And then it affects your kill value or your perk score.
If you choose the "perk icons" mode, then all you get is id's for friendlies (only the id, no country icon), but for enemies you only get the country icon, and that at reduced range (3.0 instead of 6.0).
Then you tinker with the way scoring works. Icon kills iconless, gets 1/2 of kill value. Icon kills icon, gets 2/3rds kill value. Iconless kills icon, gets normal kill value. Iconless kills iconless, gets 1+1/3rd of kill value.
It gives players a chance to migrate and try it out for themselves. It's statable so HTC can figure out how popular icon changes are with the populace and work out how to proceed with broad-sweeping Main Arena changes.