Hopefully sami's still reading down this far into the thread...
I really love this change, but it's put an even larger (MUCH larger) gap between those that fly regionally/domestically and those that fly internationally.
If you fly a lot of short-range flights your planes are now largely useless as much as 6 hours of the day (as they should be). But if you fly long-range routes, this change yields a fairly minimal impact to your operations -- you can do what you've always done and make as much money as always. Those routes/airlines have always been the absolute worst in the game for extraordinarily unrealistic profits, and now they net an even much larger benefit by not being affected by this demand change.
Those that were smart, and/or experienced from Beta, started off the game throwing down a few international routes, raking in the huge amounts of dough (and the loans to create exponential growth), and using that money to finance an aggressive domestic expansion. Those that weren't up on the changes suffered MUCH slower growth than in the past. This has created a very noticeable disparity between airlines in the game -- a disparity that always showed up eventually, but never this early.
Now, again, I love the changes to night flights. And I love the slower growth as well. But, just as before, you always had a group of players that knew how to "game-the-game" and exploit the system for rapid expansion (and I was one of them), you have that to an even larger extent now. So, one problem was fixed, but it only exacerbated the differences that already did exist between the 2 models. The changes to red-eyes made a much-needed slashing of the net margins available from Domestic traffic -- now something needs to be done to the unrealistic margins to be found on International routes, as these routes were always the worst ones anyway.
At least with the lack of legs, one doesn't have to worry too much about these exponentially-growing international airlines. But eventually these airlines will start putting down 2nd bases.