Less Is More marks a kind of evolutionary milestone for Marillion. They may have emerged in the early ‘80s as the front-runners of the British neo-progressive movement (alongside the likes of Pendragon, IQ, et al.), but these days it's hard to imagine that the prefix "neo" was ever attached to this longstanding band. Four out of five current members have been on board since the second Marillion album, 1984's Fugazi, and singer Steve Hogarth became a 20-year man the year of Less Is More's release. They've come so far from their over the top, Genesis/Van der Graaf Generator-indebted beginnings that it's difficult to believe they're even the same group. Of course, in many ways, they aren't; that's the whole point of Less Is More, which finds Marillion revisiting songs from all across the last 20 years of their discography in new acoustic-based arrangements…