Sometimes, it's best to get the blunt truth, which I got, this time, from Sean.
This came just after the pictured game, where I'm playing Karn, Jason, on the right, has yet to start taking over via Meren (Sean asked, after the experience counters reached 7, 'How do you deal with that?' and my reply was 'Tormod's Crypt.') and Sean, in the upper left playing Daretti.
I didn't accomplish much-sure it didn't help that I spent most of the game getting punished by Steel Hellkite, but I didn't have any interaction at all. Worse, when I played Blinkmoth Urn, I really set Sean up to ramp his mana.
Yet my deck couldn't benefit-because anything I would pay would be destroyed by the Hellkite.
After it was all over, Sean put it to me: "What does your deck do?"
Well...it has a myr subtheme and a eldrazi subtheme and...
Sean just waited as it became pretty clear that I didn't really have a plan.
Now, I don't think that's bad but since that is the case, then I need to clear some of the deadwood in Karn's deck. Without a focused idea to bind the deck together, I can't rely on synergies, which means that I have to amplify the deck's overall power level.
That is a bummer to consider though; that I got swept up in the tiny details of card selection that I failed to look at the bigger picture of what the deck should do.
On the bummer scale though, it's maybe a two. I'll live.