I thought it would be too bumpy/more cabin & dash shake so thought a refresh would be fine.
....No, just 2 poly wishbone arm bushes are not going to have such an effect but will better balance and better spread the stresses when a WALK or SALK is fitted.
It's front engine mounts which can add very minor vibrations. Bumpy or bouncy suspension is due to an amateur or incorrect setup, often when people slam it down too low just for looks. I have full poly bushes, WALK, engine mounts and get no "shake". It's nice and firm and responsive but never harsh. One of my best mates is an ex-biker and has lots of metal bits etc in his legs and so is prone to feel any discomfort - He frequently rides passenger in my car and enjoys a spirited drive on A and B-road rollercoasters without discomfort.