Ribbon!?
....
So?, it's a good way of grouping functionality
Agreed. What's the problem? I like it.
Is this like a Comic Sans hatred thing? 
A ribbon is like a bain marie at a smorgasbord, you have to walk up and down to look at all the food and come away wondering what half of it is. Most people that can read prefer a menu. Adopting UI's designed for n00bs in what is ostensibly a highly technical application reeks of design by mass wanking. Personally, it makes me want to punch someone in the ribbon! 
The problem isn't so much the presentation (yeah, it's still just a menu, at its heart), but the exclusive promotion of point-and-click operation
at the expense of keyboard usability. Back in the menu days, there was always, you know, "Edit/Copy ... CTRL+C" for every single option that had a key combo.
AD is a bit more obscure using key presses, which for the menu shortcuts, you have to guess at (there's no top level menu "Align", but "A" pops it up nonetheless), and the commands / submenus you have to squint for the underlined letters, but after playing with it for a few months, you catch on to the most useful sequences.
Yes, MS Office gives you the keys when you tap ALT, but it's the same key sequence thing, which is completely inconsistent with the entire history of Windows operability up to that point! The most irritating part: CTRL+key combos
STILL EXIST, but
they don't tell you what (you have to dig in obscure help articles, or even third party documentations), and I'm pretty sure
they don't want you to know because they're changing their interface methods to be mouse oriented.
And so the point is, AD is quirky enough on its own (it doesn't use CTRL+key combos, not primarily anyway), but if they're fucking it up even more (mouse oriented, if not mouse-only operation!), that's a killer.
Tim