I suspect Kat's going to get fed up with Ash refusing to ignore Tori & dump him, possibly to go work elsewhere - her boss did say that going for the promotion would involve more travel. After she dumps him he'll go be broody somewhere public where Tori will see him & decide he needs cheering up. It'll be time for Luc's nap so they'll head back to his & within 10 minutes of Luc going to sleep they'll be in his bed. Because that's how all relationships work - "we're just friends", , kissing, sex. If you're not in bed with your significant other by the end of the first kiss, it's never going to happen.
Either that, or Kat will be so desperate to keep Ash's attention that she'll get pregnant. He'll spend all his time whinging at her about how dangerous her job is, she'll berate him for being over-protective & then on her last day before mat. leave she'll get shot/hit by a car & die, leaving Ash to raise 2 motherless babies & Tori will conveniently be on hand to help...
I also dislike the new family. Coco is whiny. Ziggy is like a stroppy second rate Ricki, the mum's insufferable & I have to keep reminding myself that the dad isn't supposed to be Brad from Neighbours with a new head.
Re: Raffy, I'm just waiting for Ava to move in with Justin full time & he & Scarlett will become a family unit with Raffy & Ava. Or possibly she'll stay with Tori... or maybe John & Marilyn will unofficially foster her long-term. Or Hope will get out of prison, have straightened herself out & Raffy will go back to live with her, if they want to get rid of her character.