I really do not appreciate the new look. The first page after login is unhelpful. I've never quite seen anything so bad! There should be a common toolbar, as before, to quickly access all settings, options etc. Why change something to make it worse?? I now have to click on 'Contacts Growth Tools' to get where I want. At least that's the way I found. Current layout is not evident, intuitive or user friendly.
You would be much better advised to spend your time improving the email editing experience than playing around with the visuals. The editing experience is always lacking, and does not seem to get the attention.
I am not averse to change, but change with the result of degradation of user experience is counter productive.
A paid customer for many years, I join some others here in saying I will start looking at alternatives if there's not some serious improvement.