As Ryan Miller, the Brand Manager and Co-Designer of Disney Lorcana states, "To keep the competitive game thriving, rotating out older cards to encourage new strategies and fresh deck designs is a really important part of the next chapter." This helps prevent the inevitable power creep and dependence on meta decks that can occur in competitive environments
There are higher levels of competition now The first set championships came at a unique time just before the real competitive level of play started (those being Lorcana Challenges)
Revolt Destroy that creature if it has converted mana cost 4 or less instead if a permanent you controlled left the battlefield this turn
The IP gives collectors a chase that goes beyond the MTG community
Doing 1 damage is amazing, but putting 1 damage counter on a character might be even better
a Plains, Island, Swamp, Mountain, or Forest)