That doesn't make any sense. At all.
I say this because, frankly, if people cannot get even 3 people on any given server together who want to do content the old way, there is ZERO chance that a "classic" server would succeed. Since I came back to the game I've seen people start 'classic' shells etc and none of them last. If people can't find people who want to play like that on existing servers it makes no sense to spend the dev time and money on a classic server that will not have enough players to work anyway.
Asking for fixes to a job is nothing like asking for a special server. Improvements to BST help every player in the game if they should so choose to use BST. Having a classic server would be a waste of resources. Also there are far more BSTs than people who want to grind tediously through 10 year old content.