Really? Ceadeus is cool and the way they handled the scale of it was rather impressive, but he's really boring to fight. I was really surprised that they did virtually nothing to spice up the Goldbeard variant, since he's probably the easiest G-rank initiation fight ever. At least he's a great source for money in MH3U, since his drops are generous and they're worth a ton for how easy it is to get them!
Compared with other giant monsters? I would say so. The oil slick monster in 4 was also fun, but I really felt like I was fighting something epic with the whale-... Ceadeus fight. In terms of challenge though, I agree, Ceadeus wasn't hard at all.
Sorry about the names, I play the Japanese version, so aside from Rathalos and a few, I don't really remember their English names.