I've been really enjoying this set, it seems a bit slower and more complex to me than the last couple. All the colors except green seem decent and even the aggro decks need a lot of synergy to function well.
I went 7-1 with this Dimir Descend deck on the back of [[Aclazotz]] and two Uchies. The playset of [[Echo of Dusk]] was really good - turns out a 2 mana 3/3 lifelink is pretty dece.
I do miss Eldraine a bit, but I'm liking LCI so far. Seems like a lot of interesting synergies are possible.
I'm surprised to hear you're low on green; my best decks so far have featured big green dinosaurs. In contrast I have done pretty poorly with my two attempts at the black/white sacrifice deck.
I see two copies of [[Inverted Iceberg]] in that screenshot; how do you like it? High pick or just decent filler? I had one once but never lived long enough to craft it.
Some observations:
[[Tinker's Tote]] seems to be a pretty high pick for a bad [[Raise the Alarm]]; I have trouble getting any. It goes with a lot of stuff: craft, artifact synergies, sacrifice effects....
If you were wondering whether [[Glowcap Lantern]] was good, it is. I had it in a deck yesterday with [[Roaming Throne]] (which is also good, take it if you see it).
With all the dinosaurs wandering around, removal that's not toughness-based is pretty important. In particular I think I should be valuing [[Quicksand Whirlpool]] higher than I am.
The Dino deck is real and green can be good but I think in a vacuum it's got the least efficient cards.
I think Inverted Iceberg is better than average for the first two copies in slower U/W/B decks. But I would avoid playing it in the faster U decks, like UW fliers or UR artifacts