I do still wish BS would add in conversion efficiency. Would be nice to have automatic estimate of gravity in mash before sparge/lauter that indicated 100% conversion.
Agreed, it's a good check during the mash to see if you're grossly under your gravity mark for whatever reason, before sparging so that you can make an adjustment on the fly if needed.
That was one benefit of doing BIAB, the no sparge method meant you knew what your gravity should be before pulling the bag out.
You can look it up as a function of mash thickness, but it would be nice to see a box for "Est. Mash Gravity" or something on the session tab