Yes - But I don't see Nalak groups forming all the time either. A lot
of times he just floats there getting a tan. I think they should make
the boss spawn times a bit longer, esp since they are taggable and don't
need to be part of a group.
As far as why the difference - the things that are pretty obvious to me
are both drop 522 gear (if your lucky that is), one is super easy, the
other much harder, and the super easy Nalak that drops 522 gear is
located in a extremely convenient spot. People are still involved in
dailies very close by, or a raid team on their way to the ToTK raid have
to practically walk right by him, so they down him for a warm up or
whatever that you can jump in on. On the other hand, Oondasta is
located on an island that unless you are farming 9,999 bones for the
mount, players have no reason to visit or hang out on with no quick way
to get to. You don't need a full 25 man to down Nalak - Groups are
typicaly never full, while I've not downed Oondasta since they nerfed
him so I know you don't need 100 players anymore, but I'm not sure a
pick up group of 25 is going to cut it....
People will gravitate to the easier more convenient if the prize is the
same... Now - let him drop 530-535 gear and see how often groups form. :)