At first glance I thought they might not be suitable for solo play, but the more I look at them I think they can still work. The "awesome point" economy might need some judgement calls, and may be possible to make a little more objective assuming I get going on playing the game. I've been collecting a bunch of the monsters from the few available sources into my own sort of monster folio, for my own use. I will likely do some tweaking and hopefully add more as I go.
I have also been working on a set of cards to randomize encounters and treasures, for dungeon crawls to start with. I admit I am enamored of cards, because they are easy to customize from game to game, add new stuff, drop stuff, etc. as the game evolves. For encounters I have the main encounter cards, which include monsters, some traps, cards with minor stuff or nothing of consequence, etc. In addition, I have a set of cards to modify or add to Encounters. These are cards that do things like add or subtract from the monsters, have one time events, reinforcements for the monsters, and other sort of temporary or timely things happening. Again, some of the cards do nothing or only add color, without affecting game play. I also have a set of treasure cards, with the usual stuff, from a few coins to jewels and minor magic items, as well as nothing at all or mundane items (some, like a bag of marbles - could be useful, but isn't going to bring in much money; others are really not likely to be of much use, but who knows.).
I have also been working on some dungeon geomorphs. The pictures below show some of the ones I've drawn so far. I also have some larger rooms of various shapes. I will find a way to randomize these (more cards?), as well as where doors are, what type (open doorway, open door, closed door, jammed open or closed, locked, etc.), and "arena" types for the parts of the rooms and hallways, based on the OSH arena types.
Here are some of the elements, all based on 5 by 5 squares so they can fit together well. The inside walls are all squared off, but they could be drawn as rough irregular cavern walls as well. That's just aesthetics and doesn't really have any effect in OSH.
Using the same 5 by 5 basic building block you could also include special pre-designed rooms/halls/areas. Probably as "one offs". I think that could be a way to include rooms from published adventures/dungeons as additional special random places.In practice, other than the entry room, I only used rooms with openings on all of the exposed centers of each 5 by 5 square and closed some off as I went. You can see where I covered the ones that aren't open. I just need to work out how to randomize which are open and which aren't. As I type this I realize, that could be as simple as rolling for each opening that doesn't match up with an existing opening in any adjacent rooms or hallways, with something like 50/50 chance of it being open or not.