That probably has as much to do with the fact that most of the people writing fan films don't have the foggiest idea what constitutes real, trained writing skill.
That's not an attack; it's an acknowledgement which I think is more than proven by the lackluster and disappointing (story-wise) results we have gotten from New Voyages, Continues, and some of the other fan films over the years (Dominion, Excalibur, Axanar, Renegades, etc.)
The majority of these people are fans of course, and as such they aren't professional writers and I can give them slack for that. But then you have the ones who are professionals (or at least want you to believe they are (*ahem, Cushman*) and still deliver sloppy, lazy scripts.
Not all of the writing in fan films is terrible. That's not what i'm saying. But the majority of it is pretty crudely done and does not live up to the standard to which they aspire. Time and again its a criticism leveled at most of these fan films (particularly the big name productions) and time and again that particular criticism goes unheeded.
I get that Continues is Vic's baby and as such he has final say on everything and plays a central role in several key areas, but one which he would be quite well off to acknowledge and hand off to someone would be to give these scripts to a brass-knucled editor who can then call out the chinks the armor so to speak and help smooth the rough edges, fill the plot holes, and tighten the overall story to be more cohesive. Ditto to Cawley, Broughton, etc. You solve that problem, and a lot of the other problems/criticisms go away.