Gasoline is much less powerful than either Diesel or glow; the order is Diesel (1),Glow (2), Gasoline(3): You forgot to factor in the appropriate mixture ratios with air. In other words, just how much fuel is ingested at each cycle? Also, a lot of the glow fuel is dumped out of the exhaust still burning and doesn't help to move the prop. Not so with the Diesel.

More complication, yes; that hasn't done too much harm to the complicated, 'way overweight 4-stroke engine sales, now has it?

Lot of your other statements are similarly tainted; won't go into it now.