While I found Rift mildly entertaining for a few weeks, nearly every aspect of it got really old really fast for me. It might be fun to occasionally have a dynamic world event such as the rifts themselves, but I can see it getting really monotonous and irritating if I had to deal with it every time I log in.
Just my two cents, but I'd really be disappointed to see anything from Rift in EQ2. For me that game was just ...'blah'. I'm sure it'll get better. Its less than a year old (6months? I don't even think that long really) and has a ways to go yet. I'm just not a fan of the things that make it 'fun'. To me they spell out long term boredom and irritation.