The UI is improved for real estate visibility, but still not very friendly to a long-time user as far as muscle memory. In particular, the ‘play’ button being relocated to the top center vs. top right of the display. For my usage, I’ve found myself still reverting back to 2.4.10 to keep the more familiar layout 
At this point, there is an empty space where a second play button could be put (so you could just have it in both places).
Likewise, the ‘quick access’ to cursers – why have a sub-menu icon vs. make both marker choices directly available (single vs. pair) at the top level? (see previous Logic 2.4.11 thread response for a suggested layout).
For all the bashing of Microsoft (often justifiable 
) – the MS Office UI does provide multiple ways to access (and customize):
- Menu bar icons (with user-customized icons & toolbars)
- Context sensitive right-click menu
- Hot-Key / keyboard shortcuts
(with tool-tips above to ‘hint’ at shortcut keystroke(s))
Thus, newbies get some obvious UI hints to the common features, but power-users have more efficient access to the most-used features, as well as personalization options to decide what is ‘most used’ for themselves. With tool-tips and other ‘hints’ the UI is more self-documenting to help newbies transition over time into becoming power-users, too.
I’m not sure how others may feel about the new look – but I think a few minor tweaks would really help any long-time customers used to the previous UI arrangement.