Considering the probably 10 minutes per session I've seen blown by players counting out that accursed 1-2-1-2 shuffle, I rejoice at it's demise. It's not that the math is hard, it's that remembering where you're at when moving diagonally, then moving straight, then diagonally again seems to cause no end of confusion.
The benefits of the square book size have been extensively covered elsewhere. To whit: less intimidating (and less 'RPGish') for newbies and bookstores, VASTLY easier to hold, stays open better, easier to transport, would fit in a boxed game better. BTW, it does not, in point of fact, result in less content per page even if you ignore the smaller typeface.
As for Epic rules - d20 Modern didn't have them, D&D 3.0 didn't have them, and d20 Call of Cthulhu didn't have them. They're neither difficult to figure out (since unlike D&D, you're not dealing with a game-changing power curve every 2-4 levels pre-epic) nor necessary to cover anything in the source material (or much of anything short of Dragonball Z). In early statting-out tests, I was able to accurately represent characters at 20th level using the unmodified Saga rules that required either 21st-30th level gestalt characters or 31st+ level non-gestalt characters in D&D or d20 Modern.
I'll admit: the sample sections seem incredibly skimpy. It doesn't matter much to me because I want to use these vastly upgraded rules for other settings, but it's definitely a crimp in using the book to run an actual Star Wars campaign. The ships are the worst offenders (only ONE capital ship statted, and no space station?), but the sample characters are fairly sparse, too. Going just by the movies, I'd say Darth Maul or Count Dooku would have been considerably worth statting than General Greivous, for example; also, Jabba the Hutt.
The equipment chapter, on the other hand, I think is nicely streamlined. The fiddly approach of d20 Modern (or old school D&D with its racks of polearms) seems like it would be wasted on a game that's supposed to be fast and fun in play, not technical.
My only real complaint is that the book is just RIDDLED with typos. I normally don't mind these, but the overall package is so slick (so much more so than most RPG products), I think it reflects worse on it to have sloppy editing.