User blog comment:Ygrain/Seriously, Aria?!/@comment-3201701-20121228222857/@comment-4721065-20121230073730

Shepard never gets knocked down not because the biotics themselves became weaker but because all asari/battlemasters etc. that Shepard encounters have all decided to skip on learning Throw, Lift or Singularity and decided that knowing Warp and Barriers is enough. To be honest, it's nowhere near as bad as everybody forgetting to use sniper rifles in ME2.