Fansplaining doesn't make your case any stronger.
Sandin is still primarily offense-oriented rather than two-way, and we've got a metric f***ton of those guys; replacing one of our few defensively capable guys for another one is a bad move for the Jackets considering our defensive woes. Indeed, the only reason there's talk about Gavrikov being moved at all is as a "just in case we can't extend him we want to recoup value" approach - so we'd be looking for a deadline rental 1st or similar, not roster players of the sort we already have too many of and can't move.
He's also significantly younger, cheaper, higher upside etc.
So yes If Toronto offered Sandin for a rental Columbus would take it and RUN.
before you or anyone else says something along the lines of "Great then keep Sandin."
That is EXACTLY what they should do especially for a rental.
You seem to think, and as far as I can tell have for years that unless your team gets EXACTLY what it needs that there is no no deal to be made.
What you either don't understand or refuse to accept is that, that's not how it works, it's never been how it works especially when trading a rental.
Trading a rental means get what you can it doesn't mean you get EXACTLY what you need you don't.
Trading a rental means taking the best deal and If Sandin was on the table he would be without question the best deal.