Shockwave didn't leave much of an impression on me.  The most that stood out was Sophie Aldred's narration.  She's so good, and adds a lot to the experience.  I love her impressions of both the Seventh and Eleventh Doctors.  The actual story around the dying sun, the cult around it, and spaceship was pretty unremarkable.  It might just be me, but I found it full of creative ideas that never really get a chance to get fleshed out, and the characters were pretty boring.  Even the Seventh Doctor being manipulative kind of felt tired and unnecessary here - same with Ace having to advocate for people.  I feel like I've just seen this with a hundred different and better flavours by now.  This was written by James Swallow, a prolific writer who has done a bunch of stuff I really enjoy and can have a good voice for the Doctor.  I wonder if the format of Destiny of the Doctor might have been too restrictive for something that could have been more creative than this.