Yes. A healthy MtGox is good for Bitcoin. Bitpay and others need a proper fx market with depth to maintain their business. The other exchanges are too illiquid. I think that people who want mtgox to fail are mostly those hoping to buy BTC at 2012 values because they missed the ramp up this year.
They are not liquid because most people are still using MtGox. If MtGox were to die, the other exchanges would immediately have tons of liquidity.
And then they would have the performance problems which mtgox has had. Everyone would be screaming at them for having rubbish systems.