Their volume is still low for an exchange that aspires to be the best.
There have to be more places to buy Bitcoin or we'll have more Goxes. The exchanges can't be the only source, not all people are traders and we can't expect the whole society to access exchanges every time they need some coins for daily use. Localbitcoins is great, but we need more alternatives.
But isn't it self-defeating if you have to have exchanges in order to actually spend your Bitcoin? What's the whole point of having Bitcoin if you need to convert it back to local fiat to actually purchase anything without getting ripped off? The reality is that it isn't a lack of anonymous exchanges, but a lack of ability to actually spend Bitcoin for any and all items with relative ease and without additional costs.