My TG585v7 router is not performing well on the local network. Despite direct ethernet connection to my pc, it often takes up to a minute to build its summary page. In home network->devices it is slow to build the page then if I rename a device it sometimes forgets the rename later. I suspect that it is having difficulty with the number of connected devices (about 16 altogether). Streaming even an SD video from one device to another hiccups and makes it impossible to watch. Meanwhile it is not being stretched by the incoming broadband data as typical connection speed is about 4Mb/s due to line length from exchange. Would I benefit from changing the router and what would anyone recommend?