Great idea indeed.
But on what criteria will we judge someone being a noob...
I doubt it's linked to the level (even if above lv31 is a no).
k/d ratio needs also a little tweaking.
But limiting equipment and stats for :
-above lv30
-above gen 2 (even gen 2 are still "new")
-k/d above 0,8.
And reduce by half xp gain, so that it's also more rewarding to play it the "hard" way.