Well the shape of a rocket is not like a stack of forms, as i said, try to make it one piece, like the too detailed rocket.
Give it those characteristics that make it look like it.
And again, i really see that you are putting effort into this, i am only giving you advice.
Or at least trying to. :P
So please don't take this as a bad thing, i may sound annoying but i want to help you, though i have not much knowledge about typical Blockland model tips and tricks.
But i know there should be some around on this forum.
Try to ask a couple of good modellers that are still active. :)