Whilst yes changing encounter design would be a way of making healing more interesting if you're having to heal more, say, 80% of the time, because those glares/malefics/broils are broken up.

There are however, a few issues:
- If they only do it for future encounters, your content in ARR, HW, SB and ShB would still suffer from existing healing issues. With people having to level, people running 50/60/70, Levelling, Trials, Alliance Raid and Normal Raid roulettes, you're going to get this content. This is daily content you do for exp or tomestones. So for a lot of people, that can be a chunk of the content you're playing.
- If they retroactively update all encounters, you're talking about a laborious and long winded and heavy solution.
- If they manage it, we still have solo content and solo duties. As a SCH it'd be mitigated with the option for SMN, but if you're a WHM or AST and that's the job you're progressing through, you've still got a dull take.
- You'll have varying levels of skill of players still, if you want it at a level the higher end of players can still enjoy, you end up compromising those on the entry level of skill, which could make the role less accessible. The knock on effect here is, you may also find yourself doing runs with less experienced healers who struggle.