Just Like Heaven: Is Mark Ruffalo's Grief Too Charming?

Okay rom-com enthusiasts, let's talk "Just Like Heaven." I rewatched it last night (don't judge, sometimes you just need a fluffy ghost story with San Francisco views) and I'm left with a question: is Mark Ruffalo's portrayal of grieving architect David Abbott a little too effortlessly charming? Like, he's clearly wrecked by the loss of his wife, but he's also making witty remarks to a ghost and somehow looking adorably disheveled the entire time. I'm not saying it's bad acting - Ruffalo is always a win - but I wonder if the movie ever really lets him be ugly with his grief, you know? And speaking of Elizabeth (Reese Witherspoon's ghost-doctor): does anyone else feel like her 'amnesia' plot device was a bit...eh? It felt a little contrived to give them a reason to bond, and I think the movie loses some steam in the middle as they're trying to figure out her past. Also, her sister? Total overreaction. Like GIRL - chill. Don't get me wrong, I still enjoy the movie. The final scene at the garden is undeniably sweet, and the whole 'finding love in unexpected places' theme is classic rom-com gold. But I'm curious if anyone else picks up on this stuff. Is it just me overthinking a lighthearted movie (totally possible!), or do the slightly glossed-over aspects of David's grief and Elizabeth's amnesia keep it from being a truly great rom-com?