It would be cool if there was more ways to go in the wither storm than just strate and more things in the wither storm.

it would be sick, like veins throughout it

I like this idea, makes it a bit more believable.

We're planning on adding a village hallway type to the bowels

I may eventually make more structures for the bowels hallways or arena in the future, I'll keep this open for now

Or in each room will have something like withered sculk, withered pillager outpost, withered dripstone cave, withered geodes, withered lush cave, and/or custom places.

Implemented in 2.2/3.2

There's even more structures coming.