Important things to know when soloing Eonar:
When you get the option to go up, kill one felhunter coming up from the bottom path. If you killed everything else before that point, it will trigger the burst that will clear the adds.
When on the ship, kill the mob and use whatever speed things you can to interact with the four interact-ables with the last one being on the side of the ship exit so you can get out easy.
Use the jump/wings extra button often.
Once you learn the spawn pattern, it gets a lot easier. From what I’ve seen doing a few renewed mog runs (since the weapons from Aggramar and Argus aren’t class-locked to drop anymore) there doesn’t seem to be any major scaling changes.