I suppose they could make three one hour episodes of Corrie as opposed to six half hour ones.
I'm not sure that's the right answer either, Jack. (PS: Welcome to TVF)
'Continuing dramas' like Casualty, Holby City and The Bill (at times) manage/managed to maintain 60 minute episodes because they have the scope to bring in multiple short-term characters/storylines for each programme, yet maintain long story arcs for the smaller regular cast over much of each annual series without making them seem too drawn-out.
Soaps aren't the same: they have a large fixed cast and so the majority of storylines are relatively short, or unrealistically 'sensational' to get media attention. Guest cast members are injected simply to allow a change/event to happen to one of the regular fixed cast, or for a specific short-term event to emerge.
For soaps, drawing out those repetitive storylines over 60 minute episodes, only normally works for special events (tram crash, pub burning down/exploding again, house collapse, murder); I don't think it would 3 times every week.
Steve Williams and London Lite gave kudos