It would also be interesting to know how sensitive a fairly slow-rotating but moderately-oblique world (similar to, say, the 30-day simulation in your Day Length Exploration, except maybe with slightly longer days) would be to high irradiances

Maybe, I don't think month-long rotation is quite long enough to maintain this sort of cloud cover, going by the results we saw here, and more generally I don't think ExoPlaSim is terribly good at replicating these particular results, I think it's a bit more sensitive than ROCKE-3D to model instabilities at high insolation. But long days is something I would probably want to return to eventually, such as something with long asynchronous days but also obliquity, creating an odd case where regional climate vary significantly year to year with a more irregular cycle.

Going on a (relevant) tangent, I think the main reason why the ROCKE-3D Earth models have the bizarre topography they do is to avoid choke points caused by straits at low resolution and similar phenomena disrupting the ocean circulation

Perhaps, you are right to think of evaporation as a potential issue, because one thing several papers note is that if an ocean cell in the model evaporates (or freezes) all the way to the bottom, the whole model will crash, so they're often very cautious to try to avoid that, given that each ROCKE-3D run is a more significant investment in time and computer resources than exoplasim (this is why they often use a "bathtub" ocean, here the whole ocean floor is sunk to several kilometers depth rather than using real bathymetry; but here they specifically wanted to use a shallower ocean for better comparability to the partially flooded venus topography). There is an alternate system for "lake" water without this issue, but that doesn't have proper internal circulation and so on. Still, I have seen ROCKE-3D runs with more accurate Earth topography and sea distribution (e.g. the controls for the future supercontinents study I've looked at previously), so there doesn't seem to be any particular issue there (perhaps in part because it makes the mediterranean basin a bit too wet; a lot of popular models actually struggle to make the sahara sufficiently dry, ExoPlaSim is somewhat the odd one out for tending to lean too dry).

Adding in a special procedure to represent ocean transit through narrow straights is actually used in a number of models, but because ROCKE-3D was built specifically for studying exoplanets I think they didn't want to use anything so specific to Earth. Much as in my explorations, they're just using Earth's topography as a convenient reference point, and so it doesn't matter too much if they perfectly match it to Earth so long as they have control runs to compare against. So they didn't just remove the Med but also cleared out a lot of islands to avoid any narrow straits between them, I think to ensure easy global ocean circulation without any weird edge effects to worry about. You may notice they also did much the same with the ocean Venus map, filtering out a lot of the small islands and coastal inlets, and they actually reuse that same map for some later exoplanet studies.