I really like the last video. A little bit irretating is the change of the point of view after a few seconds. The tilt effect works also better in the 2nd part of the video.
IMHO the tilt effect is more subtle but at the same time more useful when it is not parallel to the square format of the video. Then it helps to point the focus on your subject instead of being just an effect. This still shot shows quite good what I mean: http://felixcg.files.wordpress.com/2013/11/autumn-has-come-16b54fb7be67a5b7d0f2f03678ed3ac3-hd2.jpg In a time lapse video I would not use it to such an extent but in such a orientation.
Yes you absolutely right...
I used a lot of times different angles of tilt effect, but it's became parallel to image plane ı think it is going to be more useful.
Here is another sample for tilt effect and this sample is the best picture ı ever seen with tilt effect.