They should keep it as it is. The amount of cars on the road which are not road worthy, or shall I say illegal is a joke. Wheels ready to fall off, bodywork scraping on the floor, exhausts blowing or broken, excessive exhaust deposits as a result of worn out engines, the most annoying point is faulty lights, front, rear, brake lights the lot.
I'm happy to take my car yearly, if they extend anything more than that, we're just creating a greater window to flaunt the safety of other road users!