It's easy to ask, but who will specify? I mean, when you change to a different fleet group with different speed between airports not open 24/7, the algorithm of adapting the schedule is just a nightmare. I've got ERJ145 lines who leave EDDH at 22h55, and land at airports who open at 6. I just cannot switch those lines to EJets. The plane is too quick. I can't leave EDDH later, neither land earlier at the arrival airport. So, what will your automat do in such a case?
I'm sure that if Sami had full specs containing all possible cases, he would do that easily. But he has none. As many cases are unsolvable, some players prefer to shout louder asking for "magic" solving the problems. The real world does not work like that. You want the feature? Specify each annoying case. Then, maybe, it will be done. Or not, I'm not Sami, and I'm not speaking in its name. Still, I've done my share of (successful, well, most of them)computer projects, and I fail to see an easy way to make all this work. It's a hard subject as soon as you have a slight difference in speed, due to airports having closing times(you never tried to plan tech stops in Narsarsuaq? I did, and I gave up).