I am not experiencing this at all. I have played 3 full and 1 partial game game since the new patch. My offensive line play has not changed at all. Now I am using my 1987 roster, so that might be the difference. However, in my last game I took 5 sacks and the pass rush forced me to make some really bad throws.
Have you made any other changes since the patch? Have you tried deleting your profile since the patch. Sometimes that makes a difference and sometimes it doesn't. I did not delete my profile, but I know others have.
I hope things work out for you and the oline plays fixes for you. So far I am really happy with this patch.