I miss the taunt button. Ending a crazy combo and filling a spare moment by taunting was satisfying as hell, plus there were tangible benefits to taunting too. Taunting would give you a few points to your DT gauge (later given a style point based cooldown, to prevent the DMC1 "come on!come on!come on!come on!come on!" spam) and from 3 onward, would actually cause an enemy to be more aggressive and fixate on you, though the cues for this were subtle. My preferred playstyle was royalguard, so taunting an enemy into attacking (and then caving his face in with royal guard) was not only thematically consistent, but it felt ****ing great and mitigated the RG style's problem of standing around waiting for things to happen.
In bayonetta they made the enrage effect way more obvious. DMC4 enemies would yell and act really angry, but it was easy to miss if things were chaotic, but when an angel in bayonetta suddenly catches fire and gains attack speed/heavy armor, you don't miss something like that.
Naturally the exact taunt phrases would be different, but for all those boss fights where the boss pulls back to some place I can't reach to charge an attack or emote, I really that taunt button. It wouldn't make the boss fight any easier, but it would just fit so well if an enemy fighting dante retreated to climb out of harm's way and dante gave him the finger and made fun of him.