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All I know is that our rudimentary steering system on the electric trike we made (2HP) was scary at 40MPH or above on a standard 1/4 mile oval running track. I've experienced both the under/oversteer problems mentioned above.
The other thing is we put brakes on the single small diameter rear wheel, to reduce complexity and cost of front brakes. Getting the car to pass inspection required a lot of shenanigans, such as reducing tire pressure to minimum, and scrubbing the front wheels side to side.
Trikes are a natural design concept when the goal is to make something as cheaply and as lightweight as possible, and lend themselves to an efficient teardrop shape aerodynamically. There's simply no reason I can think of to put the single wheel in front though. Even I got that one right as a high school kid.
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