I am slightly concerned about the harder game-modes not having ANY benefits too. Although I'll still be picking the hardest game-mode no matter what, I think that things such as slower prayer drain rate in PvM, a slight drop-rate boost and the double drops from W1 all go a long way in keeping players interested and active.
Would like to see at least something for the players choosing to dedicate MUCH more of their time on the server by choosing a more 'long-term' game-mode such as Realism on W1. Afterall, you didn't see many, if any at all, classic or laid-back players right at the end on W1 - it was just Ironmen and realism mode players.
Will be interesting to see what drove @Jason & Airo to this decision.