I think having higher merit requirements would make sense for legendary. Make it an actual very hard thing to obtain.

My issue with it from a selfish point of view is all of my old posts that are really great will probably never received any merit. Look how many spammers I found with alt account to in the past. I don't think anyone will ever give me that sweet sweet merit for them so I can see why this would be hard to implement for people that have already been around for a long time.