Andrew Gideon wrote:

Is there some shorthand that ATC will recognize for this?

This is a GREAT question!

I haven't found a "magic word," but concisely showing that you're aware
and capable goes a long way.

Detroit Approach seems to like hearing my request for "any assigned
altitude." Also, asking for vectors then direct to my destination is
good.

Mentioning the ATIS that you have at the primary airport is good too.
It lets them know that you know what runways are being used, i.e.,
you're situationally aware.

E.g., "Detroit Approach, 938SA over Grosse Isle, 2500 feet, request
vectors direct Ann Arbor at any assigned altitude, we have Alpha at
Metro."