banjo2E, thanks for reporting, noted. :tops:
What's making me uneasy is I want to map what's left of the network, but Map Marker Overhaul isn't really up to that task. I think it might be time I went digging for journal/map mods that let me either fill a huge notebook or scribble random junk all over the map. Barring that, out comes the laptop and some diagramming software...

Someone did up a map/list in Excel, but you'd have to ask Ervvyn who it was.
I did that myself.
IMHO trying to map all Steps locations is pointless. There are more than 800 stepstones in Cyrodiil, of which 60% is 'broken', i.e. they send you to random places. Important Steps, i.e. those that send you into lost dungeons and some other locations will have a mapmarker after you have activated them. The remaining 300 or so Steps that are reliable could probably be mapped (in one of the later quests you even get to do this for the Council), but you wouldn't end up with something like an enclosed network. I have drawn a huge map while expanding the mod, and the end result looks like spaghetti. Which is why I have to refer to an enormous spreadsheet as well.
Which is not to say it can be fun to try and find Steps connections from any A to any B, if you can spare the Welkynds. Or even to try and find all locations with Stepstones in the world. As I recounted in the previous thread:
Chances to find certain locations are often less than 0.1 % per teleport. Someone actually went so far as to try to 'find' all existing Stepstones by teleporting around continuously, listing the Steps in a huge spreadsheet. As far as I know he did not succeed. About 20 stepstones were never found, although I made sure the teleporting scripts covered them.
Yes, I got dropped within detection range of a particularly large spawn of vampire bosses (thankyou MMM) a couple of nights ago. In the dark. Without any summons and no time to cast them. Moments like that are very memorable, even scarred onto your memory.
That's why Wrye called it The Russian Roulette of Cyrodiil.