Well it only took 17 maps for me to finally do the smart thing and make colorable stair assets (instead of foolishly making one-off colored stairs to match whatever the particular map color scheme was).
The majority of this pack is colorable stairs which include:
sizes ranging from 1 grid wide by 0.5 grid long up to 2 wide by 3 long (1x0.5 - 2x3)
cracked stone and 'plain' stairs (plane could be wood, carpet, anywhere you want it to fit in whereas the stone has some noticeable cracked lines)
shadow and no-shadow versions - the shadow version works great for adding depth
shadow and highlight gradients - transparent overlays for the stairs - 3 main ways come to mind to use these: 1) over the no-shadow versions to have more control over where gradients start/end or to have stairs leading 'up' (white highlight gradient); 2) over shadow versions to deepen the shadows; 3) over other terrain types to create ramps/dips
The only other new assets are the showerheads for downstairs - all others are re-used from previous packs. When I get to repacking assets I will be sure to include some other stair configurations (ie corners), but this is a solid start for now!)
All assets zipped below alongside the Dungeondraft map files and asset pack.