I was also on the Melbourne drive and can echo
@Davman's review comments.
Fantastic car.
One thing we did (with the permission of the Ineos team member), was take out the drivers side floor mat to see how big the hump was below the footrest. It's not that big a hump but the floor mat itself has a large amount of acoustic insulation in that area (because that's where the exhaust is). Perhaps some home experimentation with tuning the amount of insulation to reach a compromise of a more comfortable footrest, but a little more noise, could be done?
For me, it was not a major issue.