theoretically sharing is just a lot harder to find.
two competitors flying a crj-100 on a route one-way each should likely set their ticket price based off of what it takes to hit 100% LF for a round trip.
I've been tinkering with my little test script here and there for how to slow the game down a bit.. and i think presently i've got a concoction that pulls about 20% of the revenue out at first go, and will likely be reducing the effect competition has by a bit (a bit more then that when i get codeshare's worked out properly). It also curves revenue upwards more now, so likely it should pull down the gap a bit between 5 .5 freq and 1 2.5 freq route.
When i figure out how to code the limit of 2 .5 frequency flights in reasonably well, it will be put in. it is, however, tricky to work out (hell, at present the close route isn't perfect enough, but it's pretty hard to "break"). the only issue is one plane flying 5 .5 freq to the same dest would still be valid (as they would result in circuits).
One final note, just because he's got a lot of 3550 euro ticketed planes, doesn't mean they're all at 100% lf.