Greatness or mega fail? I cant and wont pass judgement before i see stuff in print and try it out. Saying categorically that one will/will not play because of x/y rumors and/or based on interweb "wisom" has never gotten me anywhere good.
While I wait for stuff in print, ill keep reading various blog post and behind the scenes studf that wotc put out.
I did not like, nor did my players, 4th ed at all so I am hoping it looks alot different from that. I also hope they have learned from the failures of the various digital endeavours and avoid that like the plague in 5th....or the very least make sure it works before anouncing it as the best thing since slices bread.
As for the modular aspects....well that can be either a big hit or a big miss, part of me is dreading it...but at the same time part of me is intrigued about it, since my group rarely uses the more esoteric rules in Pathfinder anyways despite many many attempts to teach them. So if a system can be constructed like Legos, that sounds interesting.
The whole docus on 1 hour modules seem a tad worrying to me....i am not the type of dm that has the time to write adventures for my players....and the modules they published for 4th where just horrid.
Buuuuut we love our pathfinder so 5th would have to really be awesome to catch out attention....