So far I have not experienced these zones.
Wrothgar
Morrowind
Al Akir Desert
Deshaan
Shadowfen
Eastmarch
Rift
If I start leveling my toon only in these zones (as I found repeating the already experienced completed quests mindnumbing

) from level 3 will I be able to ding 50 ?
I have Wrothgar DLC but I have been told to avoid that DLC till I am at 30+ level. Is that valid ?. Why so ?