Here is a list of changes to TBC I think is pretty safe in assuming most of the player base would be on board with:
- Mount cast speed reduced to 1.5 sec (from 3 sec)
- AoE Looting
- Larger stack sizes for crafting and gathering mats (up to 200 from 20)
- LFD Tool (you can sign up for a dungeon using the UI and ppl can invite you (like the retail LFD tool))
- 60% mount at level 20, 100% mount at level 40, Flying mount stay at level 70.
- No spell batching
- Dual Spec. Cost stays at 1k gold.
- Alliance Ret Paladins get Seal of Blood.
- No World Buffs allowed in Instanced Dungeons / Raids
- Attunements are account-wide (do the attunement chain once on a main character, all your alts are attuned)
This is just the tip of the iceberg when it comes to positive changes for TBC classic. Please let me know what changes you want to add to this list and ill get it added. Together we can get blizzard to make some positive changes for TBC classic!