Ents are probably the strongest late game combat deck. Few other decks can match the stats of a Booming Ent or a Derndingle Warrior. The problem with the Ents is of course the early game, they take time to awake.
Because of this many decks use cards like Faramir or Narya to ready your Ents to fight earlier. This deck goes in a different direction: It doesn't bring the Ents into the game faster and instead covers the early game with the power of the heroes.
With this hero lineup, you can quest for six on round one and still defend two enemies and often kill both of them with Eowyn's abilty and Beorn's five attack. Sure, Beorn will often very fast be down half his hit points, but normally at round three/four he isn't needed much anymore.
Willpower is the main weakness of the deck, but here can help the "standart Lore questing crew" (Ghân-buri-Ghân, Ithilien Tracker, Mablung, Quickbeam) Secret Paths against location lock, Wait no Longer and also the Envoys of Pelargir.
If you don't play with people that are complaining about a small threat increase, you can go an even more aggresive route and include Gríma. It often helps if you attach the Keys of Orthanc to their heros and they will love you for bringing Grima. Halfling Bounders + sidequests are there against quests with horrible treacheries and no one wants to play spirit.
I definitely prefer the Grima variation here for a first turn treebeard, but this take on the ents looks solid. Tracker is one of my favorite allies and goes underused. Well done!