Yeah I think the problem with a lot of the biotic abilities in ME2 is that they were rendered next to useless on the higher difficulty settings as most or all enemies had armour and/or shields. Speaking of which, while I can understand a kinetic barrier being able to protect someone from a biotic throw, how exactly does having armour help? Seriously, on hardcore, husks can just *walk* through a singularity with no trouble at all!
Mind you, biotics were a little overpowered in ME1, so they may have just over compensated. I remember on my Adept playthrough, just for fun I took Liara and Wrex with me and we were just throwing enemies all over the place with no trouble at all, hardly needing to fire a shot. It was hysterical!