The board has been so hit and miss lately on being able to get in and post I am just getting to replying to this thread.
My first game post patch I had three runners thrown out at 3b via cutoff and relay. All players from my team. First thought "it could happen". I'm probably 10 to 15 played out games since the patch and haven't seen that number again, but I have seen more that before the patch. Not every game and certainly not the "4-6 runners - at minimum" the OP is reporting. Not saying he is not seeing this, I'm just saying I'm not.

Could be a difference in LTM's between out games.
I'd guess in the 10 to 15 games I've played I've seen 8ish total including the three from the first post patch game. Not enough sample size to say it is an issue. I hate using "feels wrong" as a reason to say something is broke, and with what I am seeing in my game I wouldn't be demanding a fix. I would however, after seeing others post the issue, think
it would be worth a look by Matt and the team to be sure something isn't off.
I haven't noticed the conservative baserunning that oldfatbaldguy is reporting in my game. My sample size though is very small.
Like DocTDC I am also seeing it happen to the cpu teams. Yeah, the first three times were all my players being cut down, but since then I'd say it's been pretty even user vs. cpu.