Which is why "Does it matter?" is a great choice.
Superman:TM is a classic that got the ball rolling on the genre with a jarring tonal shift.
MOS is a film that tries to address what it would be like as a superhero among mortals, and having to deal with the effects of one's own abilities. And yes, I think even the more action oriented second half addresses it BY showing Superman going through the grinder.
Though I will gladly admit that the supporting cast isn't really fleshed out, and that there could be a bit more character development on the part of the main hero, I feel like there is an arc, but a subtle one.
It isn't really fair to pick MOS because it's catered to the aesthetics of a modern blockbuster, and is made in an era with constantly improving digital effects with a genre on the rise. It also isn't fair to pick Superman:TM because that film will always have a legacy that no other big superhero film can share, and that is to be the first prestigious superhero movie.
What matters is that Superman is back, and that the sequels will hopefully build on the mythology and "complete" the weaker areas of its "first" installment.