Trust me do 1x xp rate. It would silly to spend hours coding a beautiful remake server to not have the regular xp rate. Everything would feel off. It's not going to turn away players if content is rich and bugs are minimal. What will matter to players is the stable server that brings back memories.
WorldScape Blitz was one of the most stable servers in existence. But people bitched about the slow xp rates and quit playing. And those XP rates were like 7.5x RuneScape or something like that. While you may get some good players who actually care about the core of how the server is built and its stability, most are just going to be lazy people who care about leveling up faster.
Although I do understand that this is supposed to be a re-make of RuneScape, and hopefully anyone who would play this would understand that as well, but if you throw in a slightly faster XP rate, I doubt many people will complain. You'll also have the people who will say "if it's the same xp rate as runescape i'll just play runescape derr I'm stupid". I don't know, people can be really dumb.