well i'm glad you've conceded all the ground from "it's unsolvable comp sci problem" up until "but one can DoS the tiny payments by spamming". i've covered a mile, you're still fighting for inches, i think that's enough for me. cheers, i'm glad you learned a lot about lightning today!

p.s. i'm sure you can google about DoS attacks on lightning and how to deal with them yourself

No, it's still an unsolvable problem. But it seems a kludge has been added that makes the damage a tiny bit smaller, and also introduces a massive vulnerability, so I wouldn't exactly call that a win.