The "next album tour show" doesn't really have to top LOTB, being distinctively different and playing some fresh cards should be perfectly enough.
TFF stage show didn't really top SBIT. It did have some additional 3D elements, such as a lot of molded details in the stage dressing and obviously, the big towers. It had very well crafted, distinctively different Eddies (regardless how one feels about that particular design) and of course, very impressive light show. Maiden England stage set downscaled the "molded detail" (in lack of a better expression), but added another big show-centerpiece Eddie, shitload of pyro and more or less re-created the etheric and otherworldy feel of the original show.
TBOS had tons of beautiful, elevated, molded details that really made the stage dressing look very "three-dimensional." Angular features in the "source material" also made it look rather authentic for what it is, as far as heavy metal stage sets go. LOTB and the church theme is obviously a bit more complicated basic design to begin with, so instead of even trying to make the dressing of the ramps reach similar depth and accuracy to the whatever type of cathedral it's inspired by, the main focus is at the interaction between the stained glass effect, lights, additional show elements and inflatables and different backdrops. The dressing of the ramps is, indeed, slightly simpler than in the TBOS show, the only three-dimensional prop of any kind being the footings of pillars, but the whole show has almost if not completely seamless visual flow, meaning that most of the backdrops, inflatables etc together with the dressing of the basic stage create a beautiful, "natural" looking visual landscape.
What I'm aiming for is that The Trooper backdrop in between Mayan buildings or space station towers looks much more random than and statue-esque Icarus in between the pillars of the cathedral, against grey, cloudy sky.
Aand, desperately trying to tie this into the Album #17 speculation, it really isn't (in my opinion) quite that big of a challenge for them to make their next show just as interesting. If the cover art and other visual aspects of the album are build around something as concrete as it was with TBOS & Mayans, Powerslave & ancient egypt or even a bit more vague, but still plausible, connection between the imagery of DOD and the eventual stage set, I'd expect them to include more actual "shapes" and" engraved" elements. Or, if it's going to be something more abstract or just more vague or just very open and extensive type of physical environment (7th Son, BNW, VXI, AMOLAD), I'd expect them to try something that elevates from ME/7th Son days, with the focus on creating more of an organic and otherworldy setting that (kind of) instead of serving as a the most suitable landscape for certain kind of songs to fit into (the whole LOTB show, TBOS show+TBOS & Powerslave, World Slavery/SBIT show + Powerslave etc.) actually bends the songs to fit itself. That sounded a bit stupid, perhaps, but you know, it's the thing that I found pretty cool in certain Maiden England backdrops: it was kind of a showcase of Maiden History molded in ice, but that concept, in the end, wasnt' taken quite as far as I'd possibly and speculatively suggest the next Maiden show might do, as a possible solution to the "how to do something different than LOTB, yet almost equally impressing and memorable" issue people have brought up.