I agree that it would be nice to press the edit button, to give you a menu with all the plugins in that chain.
Until then, you actually are able to quickly access the other plugins in the chain by using the menu in the plugin handler: Audio->Output->plugin 2, plugin 3, etc...
Alternativelly, you could use a chainer vst(i). I use Xlutop Chainer myself. Agreed, it costs a bit of money, but you can even save your chain with all its settings which is a great thing IMHO.