One change to make a cost difference in training.
In UK some airlines pay is tied to seniority not aircraft type. i.e.
A pilot with 10 year Company seniority on an A320, gets the same basic pay as someone with 10 year seniority on the A380. Flying hour pay and allowances can make a difference, with LH flying usually paying more.
The system allows a pilot who wishes to stay in the Short haul lifestyle not having to bid for LH to get the higher pay from a bigger aircraft type.. It also saves the Company multiple Type Rating courses as people move from fleet to fleet.
From a previous post, I'm amazed that a QF S/O on LH types, making no decisions and never flying the aircraft, gets paid more than a B737 FO on two pilot ops.