Most people who have spent years playing massively multiplayer online games will tell you that there's something special about the first one you played, too—and WoW was the first for many people. You can become so swept up in the uniqueness of your first experience that you overlook many flaws. It's likely many look at WoW Classic with rose-colored glasses, just as many simply forgot which features were added when. And some of today's WoW players may be too young to have even played vanilla WoW as it once was.
This is the first faction exclusive class available only for the Alliance players. Paladins in World of Warcraft: Classic end-game were considered as one of the best single target healers around. However, other Paladin specs were not that popular. While Protection Paladins found their spot with tanking groups of mobs across the dungeons, Retribution Paladins weren’t very popular in the end-game. However, Paladins were amazing levelers and World PvP participants due to their amazing utility skills and ‘oh shit’ buttons such as Lay on Hands or Bubble.
Even though a modern server architecture is used, Classic servers won't have the same features that current World of Warcraft does. There won't be cross-realm servers or Looking For Raid and Dungeon Finder automatic party matchmaking. There are still a lot of questions about how the team will tackle it. This endeavor is being undertaken by an entirely separate team at Blizzard from the one working on World of Warcraft and its next expansion.