3 is heads and above the rest.
Wider field of view also means less troublesome foreground detail.
You need to drag the shutter more to blur the subject motion, I aim for 1s. (or .8s if like me you have long exposure NR enabled) this will help with the foreground waves and the hustle and bustle in 4.
I would say in the first one there is no motivation for the tilt effect. The ship is the primary subject and when it comes to life it is immediately rendered blurry. The shot is too low and not wide enough for the minature effect, so it's use here seems wasted. You can also use a tilt shift properly which in combination with an ND can offer you great depth of field for a wider aperture, letting you use, say an ND500 etc without resorting to an extended exposure or noisy high ISO's.
The tilt can add a really cool effect, but you seem to have used it here for the sake of using it without any real motivation (that said it works well in clip 3)
There is no camera motion, which can really lift a timelapse, I have a telescope go-to head which can be put on really slow slew for timelapse pans and tilts, or you could do it the easier way and use the ken burns zoom and pan in post idea (create your QT movie at source resolution, take into your editing app and remember to add beziers to the ramps)
On the positive your exposure ramping is excellent, so you've either shot entirely wide open, or you've decoupled your lens enough so as to lock a pre-set aperture.
The colours in 1 are fantastic, I would have maybe started a stop or so brighter, giving you a bit more at the other end when it gets dark.
You have the technique nailed (other than say the longer exposure) I look forward to seeing what you come up with next.
Don't be too annoyed with me. If I'm asked an opinion I'll always give it straight. There's lots to be happy with, especially in clip 3.