It could be merged, or It can become a separate Workbench. It depends on the people who merge. The issue is that a real cut consumes a lot of calculations. So for a simple assembly of e.g. just 4 parts, there is no big issue, but for a 20 part assembly you can go drink a coffee before you see the first cut. (depending in the complexity of the parts of course).
But OK, we should nevertheless offer this feature and just inform the users that it can be time-consuming to get the cut one wants.
Personally I already used this feature because I had to explain colleagues what I designed and why.
Do you need this feature soon? If so, I'll try to rebase the PR and have a look what needs to be done.