It will be interesting to see if long haul A321s will allow BRS Transatlantic on any scale . I know the 757 used to get to EWR from there. If they can do transAtlantic they can do Dubai and the gulf too .
BRS has a good catchment area relatively close by and 'is the only major airport in the SW' even if it is barely in the SW itself. Biggest drawback is how hard it is to get to, even from Bristol, because of its odd location no rail and only minor roads even if some are A roads..