These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Esoteric Happy Ending: Leontes reunites with his wife and daughter and is forgiven by them for his crimes against them, but Mamillius remains dead and buried. This means Hermoine will never be reunited with her beloved little boy and Perdita will always have to live with the fact that she had a big brother that she'll never get to meet. And it's all due to Leontes' insane stupidity.
Why Would Anyone Take Him Back??: After everything that Leontes put her through, why does Hermoine get back together with him at the end of the play? (And plus there will always be the fact that Mamillius is dead because of his father's actions, and unlike his mother, won't be coming back...)