BSP tools are not that bad for its intended purpose.
Fixes i would like to see
- Create (multiple issues. Creates flipped face, creates split flipped unflipped face, does not create face at all)
- Faces are triangulated and loses verts resulting in geometry to be corrupt. Easy to fix by deleting face and recreating but considering above it can take a few tries
- Brush Clip. Works pretty well except if split mode is enabled it occasionally deletes faces. See above 2 points.
- No real grid snapping. Only object position based grid snapping (having real grid snapping will speed up bsp work)
- align pivot to face (no such at present.)
I think that is about it.
Then again i only use BSP to block out the level and then start meshing.
there are so many mature 3d apps out there i honestly do not see why someone would spend the time and money on developing a 3d suite inside a game when the tools are already available.
But then again… thats just my personal opinion and Epic is mature enough to make their own decisions and justifications.