I did suggest 2k heal w/ or without cleanse, since AW Sol's base heal is 1800 if I remember correctly
and of course even if AW Osiris heal is like that, she still wouldnt match AW Sol in terms of healing since she gives regen and light has ascension weps (which increases her heals) and I don't recall seeing any of those for dark yet atm (do correct me if im wrong, im just speculating after all)
and imo they work differently, with Osiris being more of an offensive healer (burst gauge increase) that can tank hits and Sol being more of a defensive healer (better healing and her debuff)
but im sure even if they don't add a cleanse to her heal, her team burst gauge increase will become higher, like maybe +25 or +30
that would kinda make her too OP in terms of having a heal that gives burst, but I guess that's also possible..