I did a review a little while ago of one of the Big Finish Doctor Who audio productions. I've listened to a few of these, and even a couple more since the one I reviewed.
The trick is to avoid listening to the extras they put on at the end after the drama, in which various people involved with the production congratulate each other about how brilliant it was. I'm sure they've worked hard on it, and they are on a bit of a buzz after working through some fairly intensive recording sessions, but telling me it's fantastic when I've just listened to it and I know it is not fantastic just makes me more aware of its shortcomings.
So two pieces of advice to Big Finish productions:
1) Cut out all the extra bits that are just self-congratulatory lovey-stuff. Either give us something that is going to enhance our appreciation of the production or don't bother.
2) Get a script editor who understands that highly convoluted plotting does not equal clever storytelling.