Both of these champions have great potential but their ramp up playstyle prohibits them from being useable in endgame content.
An EASY fix is to simply let them ramp up to their potential in the first fight. If Morningstar had the ability to use multiple special 3s to garner multiple souls per fight - she’d instantly be a popular champion again. Likewise, if VTD could store potentially all of his buffs in the first fight - he’d be a fan favorite.
For what it’s worth
@kabammiike.