Combat system is beyond saving.

[EusisLandale]

I can't quite remember- I wonder if I missed the time when this was the case in regards to Tanking

When was it that Tanks had to make macros to mark the kill order of dungeon trash so the DPS wouldn't attack an enemy the Tank wasn't attacking and pull aggro from them?

I honestly can't say I've ever seen tanks do that in this game, and I've been playing since the end of ARR.
I only ever saw that in WoW. Sheep this, trap that, then kill order. I'm not even sure if they still do that though, I quit ages ago.