Re: What about the night?
Wow! I don't see it that way, I mean, are night missions really that dangerous? Don't think so since how many titans are outside while the late night? The problem about the men's moral can be handled out by commanders and so... I know if they catch on a titan they're screwed because of the non possibility of working with the 3DMG, nevertheless they could be going on a sneaky mission with the only precaution of avoiding the last titans that are walking over the field. I just can't think about the negative points of the night time.
Well, if you've ever been offroading or driven across a field, even driving across a seemingly flat field can be a VERY bumpy affair. Moving at high speed, a car is at serious risk of major damage. That's WITH the benefit of modern suspension systems and rubber, air-filled wheels. This is why the average speed of a horse drawn carriage was around 8-15 kmph. (
http://www.ask.com/question/how-fast-does-a-horse-and-carriage-go) Technically, the speeds they acheive in SnK are nearly impossible. At any rate, moving at those speeds during the nighttime is about the same as suicide. Even if you were trotting at 15 kmph at night, you nor your horse wouldn't be able to see ditches, small cliffs, creeks, rivers, etc. If you tried to see them by torchlight, by the time you saw it, you'd be on your way to a terrible fall. If you had carts or wagons attached to the horses, it gets even harder to stop and, even more dangerous if you crash. If you don't believe that it would be that difficult, try going for a run in an unpaved grass field in pitch black and with just a flashlight. You'll likely get a broken ankle.
The other question is, even if they could do night maneuvers successfully, what would they do? The mission up until they found Eren was to transport materials needed to plug Wall Maria. That sort of mission certainly could not be done with nighttime movements as it requires lots of carts (not a small team, with a few elite troops, for example). Armin recently suggested a nighttime mission to deliver Eren to Wall Maria, but that's only possible if the mission does not require lots of carts, and only needs a small elite team.
The impressive performance of the suspension in the series adds to the case that better technology is available, but is just being suppressed.