U.A.s are such a pain to face lol. But they're definitely one of those sleeper decks that could easily catch you off guard (haha sports pun sort of). I'm not the most familiar with the deck, but I could try to pitch in on your build.
Like I said, this deck is only half-complete:
Monsters:
-U.A. Midfielder (2x)
-U.A. Mighty Slugger (2x)
-U.A. Perfect Ace
-U.A. Blockbacker
-Spell Striker
-Re-Cover
-D.D. Warrior Lady
-Cardcar D
Spells:
-U.A. Stadium
-U.A. Powered Jersey (2x)
-The Monarchs Stormforth
-Terraforming (2x)
-Reinforcement of the Army (2x)
Traps:
-Compulsory Evacuation Device
-Solemn Warning
-Bottomless Trap Hole
Extra:
-Naturia Barkion
-Number 39: Utopia Beyond
-Photon Strike Bounzer
-Shark Fortress
-Number 61: Volcasaurus
-Goyo Guardian
-Crimson Blader
Notes:
-I need 1 more Midfielder, 1 more Perfect Ace, 2 more Stadiums, 1-2 more Stormforth, Turnover Tactics and 1 more Blockbacker (should I add 1 more Blockbacker?)
-It's still missing the Crossed Souls U.A. cards, so if I get them, I'll add them
-Playmaker and Goalkeeper would be nice to have, but some people don't use them, so I'm fine if I don't get them
-Considering 1 more Re-Cover
-Don't have Emergency Teleport at all.
-This deck was built with whatever cards I could use