I have played TAS awhile back but moved onto LAH upon release. The latter is what TAS could have been (traditional turn-based RPG) and with better, generous gacha rates where each unit actually mattered (sidekicks support heroes); in TAS, rarity 3 units are auto-trash, sad.
Indeed, I think Marchosias, Tezcatlipoca and Krampus have the best character designs. Of course Horkeu, Arsalan, Fenrir and Ophion are awesome too. And for some reason I find Leib, Ahab, Volos and Gyumao really appealing too. They've improved a lot in human characters design too.