I'll admit, the time restriction is the most disappointing guideline for me. Sure, you can tell a complete story in any amount of time, but employing a format closer to that of classic Star Trek episodes was part of the charm of productions like STC. It was adopting a formula that was both nostalgic and familiar, and honestly that was all I wanted from the series. I didn't go in expecting a fan-created web version of a 50-year-old tv show to reinvent the wheel or deliver something groundbreaking.
However, I did like the way the online medium opened up all kinds of storytelling possibilities and that crowdfunding had allowed fan films to evolve to a point of being almost professional productions. Both of those innovations are now effectively dead thanks to the new guidelines, and I can't say I'm excited to see the state of fan films regress. Of course, I'm happy that Paramount is open to offering a way forward for existing Trek filmmakers (and potential new ones), but would still prefer to see the studio figure out a way to make better use of this whole phenomenon.
And let's be honest, it's not as though the studio is getting absolutely nothing out of the bargain here. If they wanted to end fan productions for good, they would. End of story. The fact that they aren't taking that route suggests they are either feeling super generous or they have simply weighed the possible options and decided extending an olive branch was in their best interest. I'm guessing it's probably the latter.
After all, they have an expensive new Star Trek film opening in a few weeks and a new streaming series in the works. Would offending a small percentage of entitled fanboys really hurt the chances of success for either of those projects? Probably not, but both titles will be entering a crowded, competitive marketplace and, ideally, Paramount is going to want as much of Trek's passionate fanbase as possible to offer support. What the guidelines ultimately offer then is a way to greatly minimize any backlash from cracking down on the fan community and its creations. It allows Paramount to reduce fan films to a level that is more easy to dismiss, while also insuring that many fans come down on the side of the studio in the process.