The strengths and pitfalls of Dust and Decay are similar to those in Rot and Ruin, so I'll keep this short: 
 Successes: Fast, gripping plot; action-packed; and interesting, developed characters. 
 Weaknesses: Use of cliches/stereotypes (surprises aren't much of a surprise) and characters need complexity (a downfall that's common in stories with fast plots: writers sacrifice character development for quick pacing). 
 All that aside, I found the novel interesting and worth reading; due to the quick pacing, I read it within a few days because I couldn't wait to find out what happened next!