Why should you always have the most tread on the back, considering its a FWD vehicle??
It is a general and well accepted rule that you should have tyres with the most tread on the back regardless of how the wheels are driven (FWD or RWD or 4WD).
The rears follow the fronts.(this may sound stupid but useful for picturing things).
If you fitted tyres with more tread on the front you could well experience fish-tailing (pretty dangerous) in straight lines which is where you are driving in a straight line and the back end breaks away from the direction in which you are travelling. EXTREMELY dangerous in the wet. As well as oversteer during open-throttle scenario's (in a FWD).
Fit tyres with more tread to the rear and the worst case scenario will be you boot it on the exit of a corner and end up understeering. And ANYONE driving a FWD car should know how to control understeer = to lift off the throttle during those scenarios.
Its sensible to say that it's easier to distinguish when front wheels loose traction - mainly due to the fact that they are in control of the driver via steering wheel. Rear wheels are generally more difficult and is the basis to the idea of being "caught out".