Pfft. Levelling arch to 525 is NOTHING compared to Vanilla. Maybe its comparable to hitting 60. But its a whole different level of mindless griding for the gearing, attunments and gold farming for gear/mats etc.
Current WoW is dumbed down compared to Vanilla?
Every class only spammed 1 spell. There was no such thing as rotations for any of the roles. There was ONE tanking class and ONE viable healing class. Druids were no where near priests in terms of healing. Paladins were alliance only buff bots. Shammies were horde only and their totems were restricted to party only and 10 yards. I literally slept through my raids spamming 1 button on my mage to epics due to the timezone differences and no designated servers, eg. Oceanic.
Spells weren't resticted to certain specs in Vanilla you say? That's because there were hardly any spells back then to restrict. IIRC, locks spammed Corruption and Shadowbolt. What was there to restrict? Hunters had serpent sting and Tranq shot, which was learnt through a drop. Not to mention oom casters had to resort to WAND DPS. Speaking of which, thats how you levelled a priest, wand your way to 60.
Need I go on about the "merits" of Vanilla?