PreProduction Unit- BBC Film Network- What Makes a Good Short?

Whilst in the process of creating my script for Inoculum, I have decided it would b well worth my time doing some investigation into what exactly goes into making a good "short film." I have noticed that some of my investigations thus far have provided very blanketed pieces of information, that can be related to many different genres of film. I feel that it would be important for me to investigate purely what goes into making a SHORT film good from now on.
I came across this BBC website which outlines how to script a good shortfilm, and although a lot of what was present was also stuff that could be used in regular feature length films, I still feel that there were some useful tips that would help me improve my screenplay writing skills in the shortfilm genre in particular.
Information I found particularly useful was the statement: "Whilst sometimes a repetitive scene can be used for comedy/dramatic effect (Groundhog Day being a classic example of where this can work), if you are not careful it can end up being repetitive and predictable."
Something I have noticed with my own script is that I seem to be hopping from one scene location to another and back an awful lot. This to me suggests some kind of repetition, which as the above statement suggests, can be somewhat of a negative aspect in short film.
Therefore I think it is important for me to see if I can cut down the amount of times I return to a scene by perhaps merging two similar scenes into one, trying to tell the story and disclose the required information in one scene rather than two.
I hope this will decrease the amount of scene-hoping in my film and therefore make it more enjoyable.

Something else I checked out was the "three act" structure of cinema. The 3 act structure is outlined here;

And it is something I have become familiar with through my research. However, something I noticed during the production of my script for Inoculum is that I went completely against this structure with my ending.
In my ending, the most action happening right before the very end. Although my film does follow the 3 act structure in that regard, there doesn't seem to be any "falling action" in my script, as my story ends on somewhat of a cliff-hanger.
I feel that is could be a risky deviation from something that is generally the norm, but I will continue to work in this way to see if it is an effective means of storytelling.