Nice work building the model.
I have only driven without front suspension, so my opinion isn't fully informed but on a list of things I'd change in our car(there isn't much) suspension isn't near the top.
One of the only relevant parameters in this game is un-sprung weight, the response rate of any suspension system and the attendant damping need to be greater than for any other sport, because you are going faster. If the suspension can't track the surface, it is worse than useless.That's the theory. In practice we watched other cars develop over several years and watched as they screwed their suspension down to a point where it didn't really work.
Rear suspension might help you hook up, that is if you've got enough power to break traction, not really a problem unless you've got more than 300hp, there are cars( in the US) running solid rears with 900hp......
Many argue against front suspension because of their concerns about ride height and cars "lifting" at speed.
Comfort wise it might be the only thing you remember about making a pass, seriously it's kind of featureless and unremarkable.
...few understand what I'm trying to do , but they vastly outnumber those who understand why..