What I will say, though, is that Digging for Lies is a fantastic change of pace. I have been at pains to find a buffer adventure that will contrast nicely with both #2 and #3, but if I was going straight from one to the other, as a lot of DMs no doubt will, I think the shift in tempo would be much appreciated.
I hope all of the adventures in the campaign will be as varied, as imaginative and as well-written as the three we have had so far.