I still haven't bought SP Gollum yet either, and I'm not sure if I will. My cousin has him though (he bought him over armored Eowyn! For shame!) and he seems okay. You can pose him in a variety of ways, more so than the bendy versions, but he looks a little goofy.
With the repacks, I see it both ways. There are some figures that should be revisited - Arwen, Elrond, Bilbo, Boromir, any type army builder. Others, like Gollum for instance, no. And the repacks (to this point) actually sell. This is excluding the ROTK bendy Gollum and Smeagols currently clogging my local TRU.
I expect TB will continue producing original figures for some time, and the repacks are simply a means of catching the many, many people (like myself) who came into this mainly with The Two Towers. There are even figs from TTT that could be, should be repacked (Easterling, Rohirrim Soldier, Elven Archer).
I think when the Trilogy line hits in Dec./Jan. and there are lots of people high on ROTK who don't have a Frodo, Arwen, Ringwraith, et al, these will do pretty good.