Multi engine fuel crossfeed question (Duchess twin)

Hi All, I'm working on my multi rating in a Beech Duchess. I'm
curious about an item that doesn't seem well covered in the POH and
elsewhere for that matter.

What if you loose one engine at altitude, allowing plenty of time to
try to fix. You determine that you ran the right tank dry of fuel.
According to the fuel diagram, you should be able to run both engines
off one tank. The fuel line exits each tank and splits: one going to
the opposite fuel selector and one going to the closest engines fuel
selector.

If this is doable, why is it not talked about more? It's not a "fix"
option on the checklist and not discussed in the text of the POH.
Crossfeed is considered an emergency operation according to the POH,
and also "level flight only". Could this be why? Possible fuel
starvation on the crossfeeding engine from maneuvering to land, where
it may be safer to feather and secure the dead engine and do your one
shot landing.

.... akiley