Oh dear; that's a shame that DXB went to NCL. I would have thought that would be another flagship route to go alongside EWR.
I'm not sure how much of the terminal expansion is aimed at us "business travellers". We tend to be awfully bad at spending money in shops and cafes, generally preferring to turn up 10 minutes before gate closes (boarding pass already printed out at home) and race to the plane.
I understand that BA's Terraces lounge is getting the chop? With the future of Flybe's aspirations at Bristol still somewhat uncertain, I wouldn't be embarking on a lounge extension plan at the moment. You might find the only lounge passengers are from the EWR flight each day (12 of them) and a handful of KLM, SN and "Priority Pass". (Although I guess you can also book directly and add them to package tours).