Pilots and Engineers in route planning? Sure, no disrespect, but the fundamental decisions there are payload/range and discretionary income of the target market, plus desire for inbound travel on their part, yield and competition pricing strategy.
Except when they buy the wrong configuration, put aircraft on routes the type isn't capable of supporting, wrong engines, wrong certification - all done at various times in the last 15 years. Or even better, lease new aircraft to park them! Expensive and very stupid rookie mistakes that are totally unnecessary!