[Bracpan]

Having a small scrub radius is beneficial as it allows the wheel to react less to braking inputs due to the smaller moment arm and increases steering stability under braking conditions.
I found a good drawing one day of the Front Suspension of Ferrari F40 and it had a considerable amount of Scrub radius. The F40 has been commented on many times on how good the steering and the feel is by many top drivers.
Also if you read books on Suspension Design by people like Allan Staniforth he hardly mentions Scrub radius as its not that important.
If there is no scrub radius you have very little feel through the wheel, certain Audi's and VWs had this and with the addition of Power Steering the steering feels dead.
So a few mm of Scrub radius is no problem, its more important to get the proper clearances so the tyres don't catch on anything.