First off, I love the modularity of kohana. It has made my production pace so much faster than before and far more coherent. I believe anyone who has a fluent understanding of oo design, especially related to php can deliver all star software with no problems using this famework. Does it have room to grow? Of course. So let's keep growing it.
I certainly like the idea of setting modules on a per controller basis! However, I'd like to see some data on the overhead incurred by all modules loaded in the bootstrap vs cherry picking them. Perhaps it is better to load them once then store them in memory?? Or there may be better options, too.
I guess it's time to fork Kohana and contribute.