Holy cooooooow. I have improved SO MUCH. I used to come up with little stories that I would write/illustrate in composition notebooks for school that were just awful. Maybe a good premise, but as far as actually writing out the story and everything, they were just pathetic. A great way to see improvement in my work I find is to look at some of my early brickfilms from like 2009 and then look at my newer stuff from the last two years or so. Massive improvement.
My plot lines back in the day would basically be
A. Clones arrive at planet
B. Clones get attacked by Battle Droids/Creature/Bounty Hunter
C. Clones kill everything and leave
A. Decepticons have a plan
B. Autobots find out about the Decepticon's plan
C. Autobots win cuz good guys
Now, you might be thinking "Well, that's basically Star Wars and Transformers in general, isn't it?", and sure, that's how those stories go, but they have explanation for why things are happening. My stuff back then was JUST those plots without the explanation.
Nowadays the plots are much more interesting, with actual characters and reasons for why things happen. I feel like I may be a bit too 'expositiony' at times, but over explanation is better than no explanation, right?