You should be with art. That's how you show your appreciation for it, by being honest with however you feel. They can't grow otherwise.

[ How can they better the script for next time? How can they further convey the meaning? Is there anything that can be done without, to fix the pacing? Is it an old story, or a new?

It's so fun to see. ]

And if you don't end up liking it, that's fine. You tried.