I did teq for 5 years, zero latency lag. Now you get tons of lag anywhere on the map when doing teq.
If your new servers cannot even support your games content, then your servers are not functional for your game. It's time to revert back to your old servers and not downgrading just to save costs, unless you think saving costs is worth losing players who won't play a game that's a laggy mess in any big meta event.
Big open world meta events is one of the unique things of your game, and it's main selling points. Your servers cannot support such content, that's bad.