Yes, you will be DQ’d.
I don’t know about that. Good racecraft can help some but there’s no real substitute for horsepower.
I just got upgraded after this morning’s Absa Cape Epic event. I finished 12th but somehow put out more w/kg than all but three riders in front of me. My time in the C race would have me in about 150th in the B race. I would have to have some super special racecraft to make much difference in the B race. I established an all time high event average HR so I don’t anticipate going that much faster in the future.
Zwift races are going to be a different kettle of fish going forward 'cuz I’m sure not going to be entering races down category after loudly complaining about all of the bullies fouling up the C races.