That would be positive. Weak downward movement would be positive too. But violent "bubble II" rallies are bad along with 10% drops in a week. The problem with both of those is they both delay the orderly bottoming of the market. The large drops end up causing technical rebounds which the press turn into "this is really the bottom" news stories which then cause more rallies in some overpriced stocks.
I believe we need a multi-year U-shaped bottom in the averages while at the same time the sectors realign themselves to more equivalent valuations. Anything that distracts from or delays that bottoming process is just delaying the return to market health. And an unhealthy market won't be able to absorb external shocks which would then drive the fed to even more market meddling.