From 2.1 MBS to 2.8 MBS ? I'd rather go with no internet . Don't know what to do from this point.
Answers (1)
You are right, your Powerline Adapters do need to be on the same ring main. Significant speed is lost if you have to go through a circuit breaker box, (I believe this is due to the circuits alternating current being out of phase).
As you probably know, you do not connect them on to extension leads & anti surge.
There are powerline adapters which have a wifi output which you may be able to plug in to a socket on the same ring that is as close as possible to your PS4.