I'm not your target user, but my intuition is that many people:
1. Know what category of visa they've applied for
2. Know their priority date
3. Need just two pieces of information: (i) is my priority date being processed already?, (ii) if not, how many months are there between my priority date and the priority date of applications that are being processed.
So having just those two pieces of information in an email could be helpful.
As I said, I'm not your target user, so I could be way off!
