As much as I like the idea of a new park and am curious about all these scenarios getting kicked around, I'm inclined to agree that:
a) The current site (close to Union, in the heart of southcore etc.) is preferable to the Portlands (an area that will be infilling for decades), though one must concede that the area around SkyDome was also leaving a lot to be desired back in 1989;
b) It might not be impossible but it would be very challenging to rebuild on-site.
The building does have pluses. The location is ideal. Structurally, as far as I know, it's in great shape. The roof still works, again, without issue, as far as I know.
It has wide concourses and if the style is dated, that's superficial and they've been making improvements inside and outside with banners, signage etc.
So what I'd like to see is sort of a "What's the maximum they can do in a renovation?" scenario.
Let's say, hey, we've got a decent BUILDING here but it can be made a lot better than baseball. I suspect Shapiro and others have already undertaken this exercise and have a wish list but:
-Can they take out the north end, with the hotel, and open it up to the City (even if it's just the space above and around the "Flight Deck" and scoreboard)?
-Is it too hard to reface the concrete exterior with brick or something else warmer?
-Can they redo the seating so it's properly configured/oriented for baseball?
-Can they implement a new roof, either as an entirely new system or something that uses the same tracks but has a more modern (eg transparent/translucent/open) look?
-It sounds like the renos that would be required for grass were deemed too substantial but I guess they'd still be cheaper than a new stadium, so I'd throw that in the mix too; is that impossible or just very hard?
I don't think there's a real appetite for a new stadium, despite the grumbling about its shortcomings. I also don't think there's a really viable scenario for replacing it.
I think we've seen the pros/cons of relocating the team and there are definite downsides but maybe you do a major reno and if the team plays in Buffalo for a few months, that's tolerable?