Yes we'd love to see a Heathrow T2/ T5 style terminal, but the bare facts are:
Heathrow - airlines have to and will pay £millions for a pair of slots and around £40 per departing passenger in charges. MAN - airlines pay zilch for a pair of slots and £7 to £15 per departing passenger and won't pay any more. OK, HAL doesn't get the slot money directly but shows how skewed the picture is.