I'm surprised you guys are THAT bothered by the ringing noise on high. I can hear it if I hold the light up by the side of my head, or if I'm in a very quiet environment (like at home with no a/c running or anything).
Anyway...
There's a saying, "better is the enemy of good enough", which I think applies. I'd hate to see them (Fenix) mess up a great light in an attempt at "improving" the design.
But I'm already leery because I don't like the direction they took with their other redesigns.
And for the love of God I wish people would stop bitching about Cree rings and smooth reflectors. If you actually use the light outside instead of shining it at a wall you'd see that it doesn't matter.
Upgrading the emitter as time goes on is fine because it doesn't change the function or form of the light, but otherwise the design is good, why mess with something that works and is obviously a success.