I do not understand why some people are whinning leveling is slower in 7.3.5. I doubt whether they did level characters before 7.3.5 and after 7.3.5.
I did level characters in both 7.3 and 7.3.5 manually without any power leveling. They all took me 3 days play time. Maybe they could just level in 10 minutes from 1-110 before and now they could not?
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At least, you need provide me evidence why it is slower. In fact, you can now queue multiple dungeons with different quests which actually increase your leveling speed. It is true that some health of NPCs in draenor is not well-tuned.
However, leveling is not actually slower. That is false.
BTW. You should avoid leveling in contested territory from 1-60 in pvp servers to avoid PVP. There is no good reason to go to these zones any more. If i knew that before, it would take me even less time.