I have to ask other people's experience now.
First i'll state that I do like the level scaling so this is not QQ about that. It is also not intended as any sort of QQ. It is simply me telling about my experience regarding questing now and what other people encountered.
I have been leveling a void elf alt. At roughly somewhere a bit past 30lvl I noticed I could not go to next zone after I completed all quests in lower minimum level zone. I did an extra zone elsewhere and was barely able to go that next zone I first intended to go to. I do not use heirlooms, but at that point, I had realized there is not enough xp available in the zones without them. I equiped them and continued leveling and with them I was barely able to continue to next zone without having to do another zone(s) elsewhere.
So with full heirlooms I barely got to next zone. This makes me think either XP from questing is scaled too low OR it is intended that we wear heirlooms.
Ok so... to continue. After 40lvl, it seems all zones that used to be 40lvl or above before scaling are now 40-60 in vanilla zones. I could drop all my heirlooms by now, but I dont think I would get 58lvl so i could go to outland without having to run around completing other zones, if I did drop my heirlooms.
There is also a problem why I decided to make this thread. If quest XP is still too low from tbc content onwards, there may simply not be enough zones and quests to complete if I dont wear heirlooms. Which is why I ask other people's experience to ask, if this is the case?
If you used heirlooms after vanilla zones, did you barely get enough xp to complete quests or did you do less, same amount or more zones that you did before scaling.
Mostly I'd be interested hearing from people who leveled WITHOUT heirlooms and tell of their experience.