Hmmm what else is there to say that hasn't been said already?
The old layout had everything right there in front of you. Subscribers, friends, etc. this new layout has Some of them - but - you have to go searching for them. And so far in all my searching I can find no way to see who my subscribers are.
Sorry Google YT Karl, this new layout is not very user or channel owner friendly at all. Might be more plug and play for your Google+, but as a stand alone YT design I do not like it and find it quite difficult to move about it. I much prefer the old layout.