I've been running The Great Modron March, interspersed with Well of Worlds and The Eternal Boundary, converted to 5e. It's very easy to convert 2e content to 5e, and I made a whole Planar Bestiary for the monster stats, which is the most time-consuming part.
If I was going to redesign the setting, rather than use the old lore/adventures, I'd probably lower the number of factions, since 15 is a lot to manage. Otherwise, I'm pretty happy with everything about classic Planescape.
Thats a lot of work converting stuff. Way to go!
I've never run PS before. I've played in it several times. Our DM at the time did at least well enough that I fell in love with the setting.
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