"Hey bro, lets go to warmane, I hear they have the best cash shop system ever!" - conversation that will likely never, ever exist.
Warmanes popularity is largely due to is being the only quality server that you can be sure wont spontaneously shut down, it has absolutely nothing to do with any cash shop system.
People already dislike the cash shop, just leave it how it is, any further tampering is just going to annoy and drive people away further.
You know what would be superior to insta boosts and character trades and would boost population and help drive the ecnomy and classic zones???
Making it so people actually level their damn character as intended in the original game instead of multiboxers boxing 20 accounts to sell at max level.
Seriously, for real, if i wanted character boost, ez mode, gg playstyle, id play retail, I came to outland to avoid crappy retail mechanics and cash shop systems, not to encourage it.