Ah the good ol' blizzard twist... never fails to deliver.
95% awesome 5% wtf
This isn't legacy servers by any stretch of the imagination. You guys could actually do exactly what they are describing in pristine servers now... it just takes self control.
Turn off xp - already in game
no heirlooms - pretty simple don't use them
don't use raf - pretty simple don't use
don't cheat by getting a high level to help
You can take that same 150k active members and move yourselves to an abandoned backwater server, and create guilds that follow these rules.
I've read the many angry child posts... this isn't even close to what you were asking for.
In fact its really what most of us who were against it were saying... don't like it, don't use it.
*edit*
This is why I gave up trying to change Blizzard and wasting my time with feedback. Because IF and WHEN you actually do see a change, its some bastardized version that you weren't expecting, not what you asked for, and not what you want.