Just to add a bit to this, Johnny, I played a handful of games with Tonic's suggestions last night but found the CPU a bit *too* good at getting the puck away from me so lowered the effectiveness down a step for CPU poke check and stick lift and put the CPU aggression to one below halfway.
That played really nicely and on seven minute periods I got three PPs in about two/thirds of the games I played. All tripping, slashing and hooking. There was even a 5 on 3 in there.
I can live with this although it's disappointing that I'm just not seeing major pens or checking infractions committed by the CPU.
I cycle the puck a lot ( so much that Doc starts the "still no shot!", "why's he not shooting? " comments but find that deke-ing with a skilled forward through a pair of defenders with R1 followed by a hustle can bring tripping now a fair bit.
Turning away on puck reception and a quick hustle from anywhere in their offensive zone can bring pens but not as much as you'd think. Not seeing "protect the puck" enticing the CPU either, if anything they keep the sticks a bit more under control - because they have less chance of getting a turnover I'd assume.
All this on Pro, CPU difficulty adjustment fairly high ( forget what exactly ), game speed 2, CPU Human player acceleration 2 also.