Thanks! Here's my list.

Land (23)

1x Breeding Pool
1x Desolate Lighthouse
1x Forest
6x Island
4x Misty Rainforest
1x Mountain
4x Scalding Tarn
2x Steam Vents
1x Stomping Ground
2x Sulfur Falls

Enchantment (4)

2x Blood Moon
2x Spreading Seas

Artifact (2)

2x Vedalken Shackles

Instant (17)

1x Boomerang
3x Cryptic Command
2x Electrolyze
4x Lightning Bolt
2x Mana Leak
3x Remand
2x Spell Snare

Creature (10)

1x Grim Lavamancer
4x Snapcaster Mage
4x Tarmogoyf
1x Vendilion Clique

Sorcery (4)

4x Serum Visions

Sideboard (15)

1x Ancient Grudge
1x Combust
1x Dispel
2x Engineered Explosives
1x Flashfreeze
1x Jace, Architect of Thought
1x Nature's Claim
1x Negate
1x Relic of Progenitus
1x Shatterstorm
1x Sower of Temptation
2x Spellskite
1x Thragtusk

Main differences between ours:

I have one more land, on 22 I felt mana-starved a bit too much, but I haven't really revisited the number since cutting huntmaster and adding spreading seas. I also really like having a loothouse for grindier games, and the UR mirror.

One fewer moon - I find myself playing against a lot of twin and burn, so I prefer having the moons be more of an "oops, you're locked out" card than my primary game-1 strategy.

Snare over Pierce - I saw your reasoning in the article for it, and while I agree it's not the greatest right now, I like it more than Pierce in the burn/Junk/affinity matchups, and it hits snap/remand in the blue matchups, which is still relevant.

Lastly, Lavamancer over Clique - mostly because of how much lingering souls I'm seeing right now. Lavamancer also teams up with a bolt to take down Tasigur, Liliana, or Rhino.

I'm not totally sure how to add rationale to the sideboard, I just wrote out a list of matchups, put the cards I would cut, and chose numbers of cards in the board to add in.

Thanks a ton for your time, I respect you a lot as someone who actually likes Modern and doesn't just play it because he has to.