Then it should probably carry an impact on the characters.
Some heroes can kill and not lose any sleep over it. Clark isn't one of them. So while I totally support Clark using lethal force on the rare occasion he has to, I expect that to weigh on him because it's weighed on him every other time he's taken a life.
And really, this is just my personal approach to writing; you don't throw stuff away for no reason. It's needlessly limiting. If you write something that doesn't go anywhere or say anything, you're wasting time.
.......yeeessss........
OW@W is a tough one. It's not actually that great a story. I mean, you're not going to marvel at it's clever execution or plot or characterization or anything. It's like a summer blockbuster movie; it's loud and big and a little dumb but its wild and crazy and fun; it's got some really big ideas and several really damn cool moments. So if you read it, go into it like you would go into a MCU movie; don't expect anything terribly intelligent, just expect a spectacle. If you do that, you'll probably enjoy it, but "For the Man Who Has Everything" this is not.
As for how hard it is to find in trade, I'm not sure. I know there was a big collection released not too awful long ago but I dunno how hard it is to find. I doubt it's a big seller though, so I'd bet somebody has a copy somewhere.