In the first Dungeon Defenders, players could swap between an unlimited number of heroes during a match. This had several benefits, including the ability for individuals to access more than just one set of defenses. It also encouraged players to create multiple heroes -- and sometimes specialized versions of the same hero -- to use in a single match.
But this system created a few issues. Leveling multiple heroes became the only way to play -- you couldn’t complete the late-game content using a single hero. In addition to this, it discouraged true, four-player co-op in which every player has the chance to contribute to the build strategy. Instead, designated builders would bring in their heroes and tell other players not to take part in the defensive setup.
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