Not at all and I apologize if I sounded standoffish. Cv replacement is the most common fix when pertaining to a complaint of vibration only on acceleration. I've had shafts pass the visual and physical (check for play) inspection, so they only get you so far. You need to get the car up in the air, safely. A lift is preferred but level ground and jack stands will suffice. Have someone sit in the car and get it up to 40 or 50mph. You should be able to see one axle wobble more so than the others. A shudder sounds more like a transmission, center diff, or rear diff issue but thats just where my mind goes.
Liberty: The problem going away sounds a little strange. Not sure if you mentioned that before, but if you did, I'm sorry I missed it. A sticking caliper may be the culprit. Make sure the pistons compress the same on both sides, the guide pins easily move in and out and that the pads are not stuck in the brackets.