I do not do this, nor do the AHJs that I normally work in allow for this... But I have seen essentially just a BOX (that gets stamped/sealed) with the EOR's name, license number, and expiration note (all printed) - followed by a blurb stating "I hereby certify that all XYZ has been prepared under my direct supervision and control." (or whatever the exact local law says you have to do). However, I am not the stamp police, and you need the local AHJ to sign off. I prefer to seal each page and will likely do so going forward.

I believe the intent of the change is so that you can stamp the cover sheet which lists all the drawings. You can indicate the drawings which each engineer is responsible for with some formatting. In my jurisdiction each drawing must be stamped and I don't believe there is any plans to change that.

We've been doing this for years in my area. Coversheet(s) stating "XYZ prepared Sheets X-Y and specification sections X-Y". However, doing this actually creates MORE stamping if you aren't already doing it.

I do not have an example handy, but it is quite common in my area to do the following:

Drawings - each sheet is sealed in the title block. Mechanical drawings sealed by mechanical engineer, structural drawings sealed by structural, etc...

Book Specifications - The specifications that accompany a drawing set have a cover sheet. Essentially it has boxes for the 'responsible engineer' for whichever discipline to add their seal at the front of the package. For a typical building project there would be a place for seals from the architect, structural, mechanical, electrical, etc.... on the same cover page, together at the front of the specification package.