If Chemist does get added it will be a magical based healer using mp, because it has to thanks to esuna/respose/lucid dreaming, thank you cross role you limited how healers can be going forward because any new healer has to cast esuna/respose(for that 1 single quest at lv80), swiftcast becomes pointless if no cast time, lucid dreaming is there for mp.

Now could Chemist work like that sure their cast times can be potion mixing but what do you use for raise equivalent?, how about ogcd immediate heal? shield? only damage nuke 'spell'? only dot 'spell'? only aoe 'spell'?

When you go to answer these questions Chemist starts getting more and more restrictive yet it is a goddamn Chemist mixing anything and everything is what they do to buff/heal/hurt. FFXIV current healer design feels too restrictive for Chemist and that is a shame personally.