I love WPMUDEV but W3 Total Cache solved me an issue and HummingBirds is not able.
For me there is no way to remove renderblocking jquery without stoping the theme functionalities. And W3 total cache did this for me and I would love to see HummingBirds doing that too.
In W3 I was able before </head> to use nonblocking using “async”, and for jquery plugin to embed it in head.
That would be asome to be able by hummingbirds too.