Fantastic effort from you guys. I am impressed that you have put so much effort into this patch when you could have so easily used the impending Arma 3 release as an excuse to let Arma 2 stagnate. I realise that a lot of the work done for the patch was also for the benefit of Arma 3, but even so, a lot of developers would not have done what you did.
Your use of the CIT was impressive, it almost made each and every one of us feel part of the dev team and effectively gave the community a voice in the development process. By doing it this way I think you have built a better product.
I especially liked the 'surprises' you threw in along the way. Interpolation, Injectors, memory allocators etc - this kept everybody's interesest and showed you were serious about not only bug fixing but making the game better. Some of the 'big' changes you threw in while in release candidate stage would have had given some of my old managers sleepless nights - but that's what makes life interesting!
I am struggling to find anything to say regarding what you could do better really. The patch notes could use further improvement, but even they were pretty good by the end.
Good effort, well done! I think you should take Sunday off!