Actually, the 2010-11 team lost the Copa del Rey final to Real Madrid, so they didn't pull off the treble again (of course, they knocked out the Meringues in the CL semis, so that certainly eased the sting of that defeat). That 2009-10 CL loss to Inter stings because it kept Barca from playing the final in the Bernabeu, which would have been fantastic. It also stings because I feel Inter won in part because of that stupid Iceland volcano that erupted and closed off air travel and forced Barcelona to bus to Milan. Of course, it didn't help that the board spent 85 million Euros (plus giving away Eto'o) for Zlatan, Maxwell, Keirrison and Chygrynskiy. Still, that 3-year stretch was fantastic - those teams were loaded.
That said, I feel as if this iteration of Barcelona is better. It's ridiculous to have a front three of Messi, Suarez, and Neymar. And while the current midfield isn't as good as the earlier teams, a trio of older Iniesta-Rakitic-Busquets is a still an excellent group.