No-one who has move to a new stadium has improved as a club. man city is the exception but that was due to the takeover not the stadium
Arsenal have not won the title since highbury
West Ham hate their athletics track
Spurs have a souless bowl
Yes the income increases but you lose your identity to corporate and tourists.
Chelsea managed to win it all by staying.
We should stay and expand and that would give us us enough seats/corporate we would need.