Many so-called "noobs" tend to have better cards than you. I imagine when you're past level 40-50 or so when most players are below your level, that you'll suffer penalties every game when realistically level 25+ people have all the capacity to build a deck as good as yours (I'd argue level 20+, but some people don't play DT or ELO...) unless you have any of the Big Five, which is such a minority of the players that it shouldn't affect everybody.
The only way this could help is for "true" noobs who are low levels and are playing with terrible decks. However, they should stay in the level-restricted (like safe neighborhood) rooms instead of going somewhere else to reap benefit of their inexperience in the game. Going head-to-head in a real, fair match against other people with similar skill levels would help noobs more, IMO. There is a reason why noobs don't get 50 extra points for beating higher-levels in ELO, so why shouldn't that apply to DMs too?