Scribble
First Post
I wouldn't mind limiting the play to a few levels but character creation and having parties made up of different class combinations will let the system get tested under actual play conditions.
Basing testing around a single party got us the 3E CR system. Just make sure every group plays Jozan, Tordek, Mialee, & Lidda and its all good.
You're insinuating a lot with little information.
By adding more and more variables you're less and less able to clearly see where a problem that crops of is stemming from.
This Does NOT mean that you do a small test and assume everything is cool. You do the test, and if everything is good, then add more and more variables, each time tracking when and where problems cropped up.