TMS system slow now remote.

I wonder if anyone can help. I'm just looking for a confirmation. We have a standard DEV->QAS->PRD TMS set up. We recently moved QAS to a remote site. Now the connection is not brilliant.

Is the only way to speed it up to break the TMS and make QAS into it's own transport directory and connect via domain connection? Will this cause issues with the transports we already had created when QAS was in the same data center?

Any advice would be appreciated.

Thanks.