Absolutely love the work you've put into this, Skelegant. Stone has a lot of fun personality and I love the added mechanics, though the whole package is very distinct from Doom. Considering your Cacoward, have you considered collaborating with any mapmakers to make a dedicated Pvt. Stone megawad? I'd love to play something based specifically around her abilities and the tale of Space Britain.
Glad you're enjoying the mod! As far as themed megawads go, while it'd be fun to make another one or two space britain maps I don't think I'd be up for a whole megawad- both because of the time/work investment and the danger of ending up adding too much extra "lore".
I kinda like the idea of Stone being like a GI Joe figure with just enough lore on the back of the box to be going on with, and a deluxe pack of accessories to tear up whichever playset you put her in lmao