Mch was supposed to be chemist actually with the gun. They ended up splitting it into two jobs
so yeah, they were making a tank and a healer, both of which turned out to be incredibly popular and now they gone and wrecked both of them
It is a combination of factors that feed into one another.
-SE doesn't have a healer designer and is unwilling to listen to feedback>healers do not get designers that take SE goals and playerbase feedback into account>healers are terrible
-SE does not have the staff required for the many roles>jobs getting pushed out untested>jobs dont get adjusted with feedback>healers are terrible
obv thats simplified, but it is completely clear at this point that SE does not give a damn about healers, and even if they did, they don't give the resources to do things mid expansion without harming their favourite dps jobs. They only made sage to round off numbers and generate hype which is why the hype for it has died down the moment its toolkit got released. All its got going for it is gundam aesthetics and being able to start at 70