Keeping up DoTs isn't actually engaging, though. It's busy work. I dislike playing (most) classes with DoTs for the same reason I mostly dislike playing melee: Busywork upkeep timers. There's no actual need to make melee need to upkeep a "damage up debuff"; just bake a little more potency in. However, that then removes the "need" for the 2nd combo, since the typical point of said secondary combo for upkeep jobs is that upkeep just to make you press different buttons. It gets even more "fun" when the debuffs are ridiculously short and mechanics or boss downtime wrecks your upkeep.

I understand that for some people, having to upkeep the DoT or debuff is entertaining. As the OP implied for themselves, they seem to like the juggling. I'm glad that some people enjoy it. I personally find it stupid, especially when the timers are under 30 seconds of duration. I play RDM because I don't have to deal with that crap. There's also a bit of freedom in terms of being able to hold a burst for movement, or wait a few more seconds until a buff is off cooldown, etc. I'm not chained (as much) to specific timers. I personally say good riddance to most of them, in their current forms. If the whole max debuffs on a target thing wasn't a thing, I'd say bring on a job more based around DoTs; but that won't happen anytime soon. DoT doesn't play well with a singular, focused burst meta, so expect them to keep removing DoTs where possible.

All that aside, because this IS the tank forum (despite this topic being more general feedback), engaging tank play shouldn't have anything to do with DoT upkeep anyway. Unfortunately, engaging content for a tank requires either more mitigation needed, or mob management, etc. My personal hope is that in streamlining/simplifying how tanks play, they'll be able to then create more engaging scenarios come 7.x. I'm not holding my breath, but you do need some groundwork laid before you make sweeping changes to how encounters are done. Whether or not that's their plan I have no idea, but I won't cry seeing most DoTs disappear, especially if it makes way for updated skill pools and/or encounter design.