vuhoo--Your LO might be responding so violently because it seems that you are starting to soothe her with one thing (nursing, rocking, pacifier), then taking that away, and turning to shush/pat at the end, leaving her wanting the thing you started with. I know you said that you're going to stop shush/pat for a while, but when you are ready to transition consider taking those other things out of your sleep routine.
With my LO, the pacifier was just as often a problem as it was a help (spitting it out, crying for it, like you describe). I also tried nursing right before bed and got a similar reaction--who wants to be taken off the boob and put in a crib!? When shush/pat finally started to work for us,this is what we were doing for bedtime: nurse, bath, book with Daddy outside, books with Mommy in nursery, crib, shush/pat. That was about 9-12 weeks. Can't remember when it clicked.
I'd been trying shush/pat since about 4 weeks, and it was torture. It would take forever! And I was holding her and singing to her before putting her down, as I was waiting for her eyes to start drooping. Then, there was a point that she started screaming as soon as I sat down! Looking back, I wasn't waiting long enough to start the routine (she wasn't tired enough, yawns or not!) and I was holding her too long (hence, the struggling, arching, etc.). As I recall, it was most horrible just about 7 weeks (your LO's age!).
Hope this reflection helped. Anyway, this is the approach I think I'll take with #2, whenever that comes. Hindsight is always 20/20, right?