Game modes without DLC characters would be phenominal considering that every time is released 2 things happen. 1 new op game mechanics introduced in to the game that nobody truly understands 2. 7/10 people are playing 1 of 2 dlc new dlc characters, and while the old dlc ones have been more balanced they are still stronger on average which is honestly ok so long as they are not OP. Every class is a game of rock paper scissors, but the op characters do not adhere to this core game mechanic. So imo a classic characters fight modes would be REALLY nice.