Gabby seems like an idjit - if they're aiming for a primarily female audience, you'd think the key would be to write a character women can recognize.
I myself would always pick Marsden. (Never saw the movie, but just on principle.)
Incidentally, I found a plot synopsis for "Last Day of Summer" - Michael plays an alcoholic & abusive husband :( I'm sure he enjoyed the role & working with Fichtner...but I'm so glad he broke out of that "jerk" mold with Impastor.
That's what I honestly don't get about the legions of Sparks fans. His female characters make me seriously question where his perception of how women think and feel comes from, but obviously there are many, many others who relate to them in a way I can't even imagine.
BTW, going back to your comment about not being able to tell if the leads are good actors, the first thing I ever saw Taylor Schilling in was a Sparks movie, and I remember thinking she was a horrible actress. It wasn't until I saw her in OitNB that I realized it was the script that was so bad.
I'm sure Michael will be utterly convincing in the role, but I have so enjoyed watching him be the guy we all root for on Impastor, as Buddy's inherent sweetness increasingly wins out over the questionable behavior and bad decisions that have always guaranteed his survival in the past.