I'm not surprised, both are quite recognisable, especially for Alison King and whilst she's not a terrible actress, the hype surrounding her is way too OTT. The popularity surrounding her has been caused by playing an extremely popular character. She was never that successful after she left Dream Team either. And dare I say it (please don't jump down my throat!) age is not on her side.
Also for Ryan Thomas having played the lad type role for 15 years means his future roles are limited as Corrie was his first job I think. I'm not saying he's a bad actor because he played the role of Jason very well just he's never had experience in other roles. If he was going to leave, he should have done it a decade ago, not after many years playing a role with little depth and character development.
But in general, how many soap actors do have a relatively successful career once leaving their respective soaps? And I'm not talking about Suranne Jones successful, just getting more work than guest roles in Doctors etc. Quite a few have came back with their tales in between their legs even those who I consider quite talented can't make it (e.g Tina O'Brien, Bruno Langley, Jane Danson etc).