Is it a good idea for Nexon to make a pre-BB server? Would you care?

While the game has changed badly in some cases, such as the dependance of cash due to potential, some of the differences also depend on you. Idealizing your memories of the old game don't necessarily mean that the game was as good as you remember it. It doesn't help that when you first experience Maple it's all entirely new and interesting, there's so much to learn and to see. If you went back now you would already know everything. There would be nothing new to look forward to. If anything, that might make the old leveling format even slower than it was before.

I understand why you want some old aspects of the game back, but I feel like when you finally get it that it won't be as good as you remember.

I just want diverse terrain and vast maps. There was a sense of wonder that still exists even today as I look at images of the old maps.

I think equips dropping every minute or even more frequent is kind of ridiculous. You no longer cherish your finds as much as a result.
A crafting system where you can directly work on an equip item and upgrade it to a different, stronger equip, helps the player to feel engaged and more directly involved in the game.

People are already used to the game the way it is. If they go back and play in a server based off of v.62, they would get bored very quickly due to lack of content and lack of updates.
Look at Project Nostalgia. It only lasted, what, 2 months? I highly doubt this would get much further than that.

It failed because, even despite their efforts, they were just playing old-style in a game that had entirely changed. The fun maps are gone, replaced by the sucky Big Bang maps. No one takes the ships anymore.
No Monster Carnival. No Ariant battle PQ.
no fun.