To be perfectly honest, I think that it'd have made more sense, and been far cooler, if Patricia Whitmore were the main hero. There's a more direct connection to the events of the first movie, she has plenty of motivation (seeing her mother die and her dad save the day due to being an ex-fighter pilot), and it'd have made their interactions all the more interesting. Not to mention that Maika is a really good actress, so she could have pulled it off I think.
Or heck, make Patricia and Dylan the co-leads and have that dynamic be a big part of the movie (the children of the two big hero pilots of the first war). That could have also worked.
But no, instead we got Not Thor instead. And making Will Smith's adoptive son a side character in favor of Baby Thor (as they also did with Patricia) in favor of this guy, was a big mistake, I agree with that as well.
Oh and PS, give Rain more to do than just be the object of the "wacky best friend's" lust obsession.