Honestly, none of my issues with Rome 2 have anything to do with wanting more (or less) depth or complexity. The big issues, to me, are the lack of believably-realistic unit collision mechanics (which is purely aesthetic) and how inefficient and obtuse the UI is, especially compared to other entries in the series.
I've seen the whole, "oh, it's good because it appeals to arcade gamers, so you just aren't appreciating it properly" since Rome 2 launched. And, really, it just kind of reeks of, at worst, apologism, and at best, a kind of base misunderstanding of the entire franchise. The whole draw of the franchise has always been its relative simplicity relative to the grand strategy genre. Fans have always appreciated the simpler systems and "arcade-like" mechanics. When we criticize Rome 2, it's not because we don't understand what Rome 2 is, it's because we see what Rome 2 is trying (and more often than not, failing) to be.