The assumption in the OP that we all have better kit isn't correct.
Changing the times as suggested will heighten the barriers to entry - my first few audaces were on a bike I found in a skip which happened to be a 1980s steel something with steel rims etc.
I'm still on a 1980s frame, but it's now a better fit. It hasn't made much difference to my finish time which is more to do with gradients, wind and number of/time spent at controls.
Here's a thought: if you want more of a challenge, then rather than asking for the times to be adjusted to suit your bike then adjust your bike to suit the times - add a brick or 6, make the wheel less true, get rid of your cleats, wear baggy trousers and oilskins, install an extra rack or 3, maladjust the brakes, make only 6 of your gears usable.
Endless fun.