First of all, as you say- you don't main a healer, so keep that in mind- you likely don't have the same perspective as someone who does. Your "fully engaged" in a dungeon could be a snoozefest for a veteran healer, I don't know what "other content" is, so it's hard to say.
Secondly, " It would suck to have to do a DPS combo and manage healing" - I have yet to see someone propose a DPS rotation similar to what DPS jobs have for healers. In literally thousands of posts.