This system is huge, I know that and the amount of dev effort is massive and I really appreciate it. So these comments come from the desire to improve and fix things that I see as impediments to useability and convenience. I'm a web dev too so I might just end up getting involved if I understand the code.
interaction is slow. it needs far more AJAX style capabilities. page reloads ugh.
Things like enabling addons and Install More Apps both take you back to the top of the page after every single operation.
Can't even Ctrl-click while installing Apps because they are form submits.
Searching channels, connections etc is tedious with page reloads and slow connections.
Some of the summaries of the Addons are vague, maybe I really need those addons, I don't know what they do though.
I don't understand what Enabling an App does (under Install more Apps), does this mean every person has to enable relevant addons for their channel? Every single new user is expected to go through this process of reviewing and enabling addons which the average person wouldn't even click on or even understand? Needs some admin control to auto-enable a typical set of popular addons with one click or even during signup a pre-checked box for the same.