The 94-95 weren't great due to the 5.0 motor being thrown into a much heavier chasis and the removal of the A9L ECU. BUT, there is/was still a huge aftermarket for the 5.0 so moding these cars and making them fast(er) wasn't too hard if you wanted to do it. Up until 99, the aftermarket for the 4.6 was VERY limited and in turn, that limited the amount of "bolt on" modifications that were done to these cars. As the aftermarket caught up in 99 and going forward you started to see more cars being moded with the 4.6. Only major difference that has kept it from gaining to the same level as the 5.0 aftermarket was cost, which is just now getting to a point where it's comparable (in some respects, not all).

The Cars from 96 on up were anemic by nature in stock form, but responded pretty well to mods when applied, just most didn't want to spend the coin to mod the cars.

It all comes down to this, 90% of cars in their stock form will get you to and fro, it's up to the owner to bring out the full potential of the car.