I'm a well read grad student who's bluntly honest about all things, although I try to be most honest about myself.
And yet, that's the beauty: he did evolve. Eventually, with the spin-off, with Hellspawn, it'll become even further removed from this issue, but that's the thing with issue one, with season one. It's working out the kinks in the world. (The creators of Angel talked about this, being a Buffy spin-off, but their point was the characters Angel interacted with, the mood, the city, everything other than Angel was different enough that they had to find their groove during season one. And they'd been in the business long enough to know what they were doing.)
McFarlane also knew a great deal about comics, but I don't think that means that issue one of a series, even a good, successful series, will show all the promise of what is to come.
It's not that this series isn't good: it gives us a hardcore character, hints at Spawn's origins, but doesn't give us everything. It's enough to make us want more, though. And Simmons very quickly figures out what he has, what he's done, and copes better, but here? With the complete amnesia, and the crying, and the memories coming bake so quickly that he had to be comforted by a woman he'd just saved?
No, this isn't the Spawn I'll come to know later on down the line, but he does evolve, rather quickly, and the storyline makes sense. So does his quick evolution: he must evolve, or die. Again. (Not a spoiler. They tell you this on like the first page, guys. Hellspawn. Think about it.)
This is making me hunger for some of the old Spawn issues.