Looks like this could be more of a not-so-heavy drama, basing on the director. She's done mostly GMMTV series (Ugly Duckling, U-Prince, Kiss the Series, My Dear Loser and Angel beside Me) and a One31 drama last year (Mai and Ter)
Yeah, I'm less "in" as a viewer if there are different actors portraying the younger versions of the characters. Plus if makeup and hairstyle is done right, actors can look substantially younger. Like Ann Siriam in Sanaeha Maya, they did such a good job during her younger scenes.