Originally Posted by
Kralljin
The general consensus among the playerbase has been that forever Classic servers should exist, considering that Classic runs on the modern server engine there is virtually no reason for Blizzard to not at the very least provide an option to transfer / copy your character to a Classic server if you upgrade the current ones to TBC.
Then you're going to lose a lot of people in the process.
Leveling in TBC still takes time, hitting 58 isn't something you do on a weekend as regular player, despite the leveling nerfs and slight changes made during TBC to the Classic leveling experience.
Not everyone will be willing to put themselves through almost the same experience merely two years after Classic release.
If you go for the "58 Pre made" alternative, you essentially nuke the old world, because it's pointless as everybody will obviously use Pre made characters, not to mention you would have to resolve a variety of issues such as Professions, how many pre mades are allowed, whether they're a timed thing or not and so forth.