Karthus quality of life (heh) changes

So if you, the reader, are anything like me, you want to like Karthus. I mean, why wouldn't you? He's a badass lich lord who basically farts death magic. He is a literal grim reaper. However, if you're still like me, you probably don't play too much of Karthus. Also, if you're like me, your name probably isn't Jerry. But back to Karthus. Unfortunately, he's been sitting at the bottom 10 of the popularity for all champions for the majority of him being around. I feel like the biggest problems of his stem from his passive and his W. His Q, E, and R I don't have much problem with. His Q is literally his whole gameplay mechanic, his E helps him with said mechanic (by zoning, deal damage while close, helping with his passive, etc.) (although it could use a bit of work), and his R is kind of what makes Karthus Karthus. I think his biggest problems come from his passive and his W. For his passive, if you die, you can possibly get a revenge kill, but in the end, you are still dead. You would just trade a kill for a kill (or possibly more). I think possibly, if once you are slain and Karthus's passive procs, if Karthus gets a kill on an enemy (not an assist), he would return to life similar to how Anivia or Zac would (with a 600 or so second cooldown, of course, and at about half health). I think this would help a Karthus that isbehind in a game, as this would heave the potential to save him, and would also encourage a Karthus to make a riskier play in favor of getting a kill, thus getting a greater reward, while at the same time, not being too abusive with the 300 second cooldown. For his W, it is a wall. Of course you knew that, but I am not a fan of the wall. It feels incredibly lackluster. I always find myself just dropping the wall directly on top of the enemy instead of using it in a clever way, like cutting off escapes or whatever. I feel like it should remain a debuff-type spell, just not a wall. Since I consistently drop it directly on enemies (and I'm betting you do too), I would like to see this changed into a wide skillshot-type attack, like Sona's ult or Annie's Incinerate. Maybe change it completely, I don't know, but the wall just feels dull to me. Also make his E tick faster after the first tick. It feels pretty miserable for both farming and damaging enemies. Please let me know what you think, if you think I'm right, wrong, a genius, completely braindead, if I missed something, or if you think I hit the nail on the head.