The introduction of Stone Sea and Sky training dummies were a great way to check if players met the damage checks for the fight. However there is no system in place that measures if healers are capable of healing the damage taken in a party setting.
Would it be possible to create a healer training dummy of sorts in SSS so that healers can check their heals per second by healing an npc that loses health at rates in accordance to the raid level at hand? 7 other healing dummies would also create a more realistic training course. Either have DOTs and sudden health spikes that healers have to adjust during the 3 minute timer like in a normal training dummy.

These kind of changes would help start curbing the damage meta and help create check marks for people to realize that you cannot just dps as a healer to succeed in content. This has been seen even in dungeons which is outside of a raid setting.
Thank you for your time.