if this server is called progressive please make it progressive not a trivial content farmshit. Current content should be challenging, like always was in vanilla/tbc. Old content can be nerfed after new releases, but current always must be challenging.
Played some private vanilla servers and all had same problem - ez mode endgame. Leveling until 60 is awesome but after that, it feels like game over. There is no point farming pre raid gear, cuz you don't need it for progression. All you need is to get 40 ppl in to raid and snowball through content. The problem isn't only items and talents. Damage calculations of some skills completely different. For example mage frostbolts on early patches was able to hit ~500 on rag ( the proof - https://www.youtube.com/watch?v=cNdZWijuty4) while on 1.12 private servers u can hit more on level 50...