[John_AZ]

Going to far? Probably not.
Some additional suggestions would be ball joint replacement.

Make sure the front wheel bearings are repacked and the axle washer is slightly tighter than the typical "screwdriver" test. Why, because when the tire is lowered and "loads" ---tightens the bearing to the race, the screwdriver test is too loose and vibration occurs.

Grab the tie rod linkage and if you can feel movement in the rack, the steering rack may need replacement. If you have PS, if you remove the boots and fluid falls down, the rack needs rebuilding.

Replace all A-arm rubber if cracked or hard.

I had the same issue and someone, somewhere wrote that this is an inherent flaw in our cars, but can be minimized with the work you suggest.
Example:5.6.11 Front wheel shimmy
A shimmy at around 70 mph on early 944's appears to be a very common problem. No one is sure why it exists, but it may have something to do with the front suspension's VW rabbit origins. A wheel-on-the-car balance job frequently helps minimize the problem.

GL

John_AZ
1988 924S + 1987 924S