For me, it depends on Dooling's role. If he is the primary backup PG, then no, I prefer 2008. If Marquis Daniels is the backup PG/SG and Dooling is the third string PG, then yes, I can see this year's bench out-doing 2008.
I would also like to see a solid defensive big man off the bench. Doesn't need to be anyone spectacular. Might not even a rotation player. Just a reliable third string center (like what Atlanta got out of Jason Collins last year). Hopefully, Stiemsma can be that guy but it's too early to say.
So those are my two questions -- backup PG and defensive big -- that need to be answered. If they go well, sure, I'll go with this year's bench. If not, I prefer 2008.
One of the things I liked most about 2008's bench was how deep it was. It went about 12-13 players deep in guys you could throw out there in a playoff game and get a decent performance out of. Third string players like Sam Cassell, Brian Scalabrine, Tony Allen, Glen Davis who offered different skill-sets to the guys playing ahead of them (House, Posey, Powe, PJ Brown). Guys you could put into a playoff game and get something out of (well, TA was more of a wild card).
Even though it was short on high quality bench players (outside of Posey), I thought it supplied good depth beyond that with differing skill-sets and reliable options for Doc to call upon where he felt necessary.
I think the 2012 bench could have a similar depth with Marquis at PG (Dooling at 3rd string) and with a useful defensive 3rd string center (hopefully Stiemsma can be that).
Also, having a high quality 6th man like Posey (Pietrus? He has offered similar value as a sixth man in the playoffs when that streaky jumper of his has been locked on but not really in the regular season) + shooters on the perimeter in House and Posey who can spread the floor + a quality defensive big man in PJ Brown.
I am going to go with 2008 for now until I see how those two questions (backup PG, defensive big) play out over the next few weeks/months.