My advice is to make a some sort of possibility to create some sort of folders so to put there routes. Simple thing which can really help organizing schedule and route management. As well to this feature to number up those folders so to see to which folder plane/route belongs to.
Also to make feature like showing average LF of those folders.
Also a possibility of changing the view inside the folder to map, schedule, delays.
I hope this is possible.
Good idea, so you can basically make a folder for 'International LH' routes, 'International SH' and 'Domestic'.
It would also be useful if you could, when creating a route again, immediately pick in which folder the route has to go to, and that it would use the next flight number in that series.
For example, depending on the scenario, I usually number my international LH routes from 001 and on, international SH from 1001 and on. So if you choose the route to be an international LH one it'll automatically fill in 003 instead of 1003. Saves a lot of clicks!