Here we have Tier lists made by Players that have played the game for a reasonable amount of time to make judgement on the placement of the characters in DRA

Rookie vs Rookie: S (very broken) - Gatomon, Impmon A (kinda broken) - Patamon B (training hard, you'll become a great fighter) - Agumon, Gabumon, Guilmon, Renamon C (can be played) - Terriermon, Veemon D (just to represent a space) E (poor him) - Wormmon

Evo vs Evo: S (very broken) - M.Garuru, Reapermon A (kinda broken) - Wargrey, BlackWargrey B (training hard, you'll become a great fighter) - Omnimon, Sakuya, Seraphi, Sting C (can be played normally) - Duke, Imperial, Imperial PM, Magnadra D (can be played with difficulty) - Beelze, MegaGargo

Overall: SS (very broken) - M.Garuru, Reaper S (kinda broken) - Wargrey, BlackWargrey A (clearly viable) - Omnimon, Sakuya, Seraphi, Sting B (viable but harder) - Duke, Imperial, Imperial PM, Magnadra C (mastering, you'll become a great fighter) - Beelze, MegaGargo, Gato, Imp, Pata, Rena D (not so viable against evos) - Agumon, Gabumon, Guilmon E (good luck, you'll need it) - Terriermon, Veemon F (poor him again, pls someone make justice) -Wormmon