As above, floor vibrations come mostly from the rear wheels which are 'attached' to the car's body. Steering would be the front ones.
Maybe the shop didn't do a good job?
Mind you, wishbones can also cause vibrations.
More uncommonly, my inner carrier bearing on the left axle has play and causes intermittend vibration in the steering, pedal and sometimes floor depending on the angle the side road makes.
If the wheel lungs are very unevenly tighten (from corrosion at the lugs seat on the wheel) it can deform the brake discs and cause vibrations
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