Idea on how they could do a revival.
I think it could be cool if they did a revival and called it "Jack and Karen" and had Debra and Eric as guest stars.
We know from the finale Will and Grace didn't see each other for 18 years or so, but in this spin-off they could simply appear in different episodes or scenes/storylines with Jack and Karen and not each other. It makes sense to make Jack and Karen the two main characters in this instance.
We could also have lots of guest stars like Leo and Vince. Will and Grace can't interact but we could still have Grace catch up with Vince or Will catch up with Leo. It could make for some really touching scenes that fill in the gaps a little bit.
It would be disappointing to not have Will and Grace interact but I think it could still be really funny. This disappointment to me would feel similar to the bittersweet feeling of the finale.
I don't think this concept could support an ongoing series but I can easily see a 10 part Netflix series. I think this idea is decent simply because it's a way they could actually do a revival and not contradict or ret-con the finale.
Although, I was high when I watched this.