Personally, I don't think anyone needs to "defend" anything.
What I do wish they would do is engage with the community more. The complete radio silence, at least officially, from Catalyst is, to me, not a good sign. Even a simple statement from official channels on these forums (pinned threads exist for a reason) along the lines of "Hey, we are working on errata, stay tuned" followed up by a weekly one-liner like "Yep, still working away on this" would go a long way in building goodwill and showing players that they are actively trying to improve, I think.
Banshee is, for lack of a better term, a shining light in the darkness that is the silence from Catalyst when it comes to engaging the player base, in that he regularly answers questions and clarifies what the intent behind certain rules were when they were written.
I don't need Catalyst to "defend" their works. I need them to show that they are listening to constructive feedback (and no, that does not include listening to people saying "YOU SUCK!") and providing timely errata and FAQ/Designer's Notes documents. They've put out one Errata document that resolved some of the issues with the CRB; they have a long way to go before I consider buying any 6th Edition books, personally, and just focusing on releasing new books is not the way to go. While I get that they are a business and they (and their writers) only get paid when they sell product, I also have to consider what I want to spend my money on based on the quality of the products that have already been released.
All that being said, once the next set of Errata is released, or if they release an FAQ before that (unlikely as it seems), I'll re-evaluate what I personally think of the quality of their product. If they just keep releasing new books without focusing on Errata for the existing one, well, then I have my own answer at least.