Suggestion: Disable the ability to purchase flying mounts in TBC until level 70.
As someone who leveled a character from 60-70 for the first-time during original retail TBC, I can safely say that the original experience and difficulty of Outland was inherently dependent on not being able to just swoop over everything on your flying mount from level 60+. It was first-hand witnessing all of Outland's wonders up close that created that feeling. It was exploring every inch and crevice of it on foot, and being subjected to a danger lurking behind every corner that made the original TBC leveling experience what it was.
The ability to fly at level 60 that was introduced after TBC, while convenient and serving its objective of speeding up leveling so as to allow players to get to post-TBC content quicker, might not be in the best interests of a realm that is planned to be locked in TBC for anywhere from 1-2 months (possibly more?). It completely neuters a lot of the difficulty and hardship that made going through Outland for the very first time in 2007 memorable. I firmly believe players will take away a more complete and enjoyable Outland experience if the restriction on flying was set to exactly what it was when Outland was originally introduced as a new zone.
Pros:
- Slows down leveling so people get to level 70 less quickly, thus reducing the number of players that blitz their way to level 70, and then go rather less active, as was observed happening with a lot of players here in Vanilla.
- It provides a leveling experience that more closely matches the experience when Outland originally came out.
- It encourages (and even forces) world PVP, where a lot of players might have otherwise just been able to avoid a confrontation by flying over each other.
The only major downside I can think of is that the level 70 gankers are going to have a field-day flying after lowbies that have next to no hope of escaping them because they're limited to ground mounts, making the ganking scene a lot worse than it right now is in Vanilla. But hey, this happened in retail TBC too.