It's not likely you had crummy pressure plates. A stuttering clutch is caused by an oily flywheel (leaking seal), burnt flywheel, worn pilot bearing, worn transaxle mainshaft bearings (unlikely), worn crankshaft thrust bearing (unlikely), etc. Someone probably covered their tracks on a subsequent visit.
Some possibilities here could be a bad rear transaxle mount, faulty front halfshafts, or a pitching stopper problem.
An example here regarding the halfshaft problem. Most shafts will click or knock when worn but it is entirely possible for a shaft to have an odd wear pattern which leads to the shaft binding while in certain positions. This can cause the car to wobble, lurch, or cause the transaxle to thump.
Last year both shafts were replaced in my daughter's car (rebuilt units). About 2 weeks later she called me from the side of the road and was afraid to drive the car any further because it was wobbling and lurching so bad. So Dad went and drove the car home at slow speed and with both hands on the wheel. It wa BAD in caps.
Disassembly showed that one shaft was seriously defective and this was the source of the problems. Replaced it and the problem was cured for several months until the other rebuilt shaft went bad. To finish the story, the parts house ordered 3 or 4 more shafts until I got one good one. Some of the "new, rebuilt" shafts were total junk right out of the box.
I would examine the rear transaxle mount, the pitching stopper, and both front halfshafts. The shafts may be impossible to check without removing them but once on the table, assuming someone knows what they're doing, should be able to easily pinpoint any problem in that area. Hope some of this helps anyway.