Another exp where you'd be better off having complete standard collection without new cards rather than vice versa. Excavate is overpriced hot garbage and highlander decks are fun for concede priest enjoyers imo.
Sure, new cards are fun. Than you face endless stream of DKs and DHs that destroy any highlander deck they face. 2 most artificial classes with no identity given 2 most toxic decks, so much fun... Of course you can always lose to otk mage who doesn't care about new cards at all.