[What i like]
1) RvR mean 2 side people that can kill eachother, that is one of the 2 great forms of PvP.
[What i dislike]
1) RvR is utilizable only into a tiny part of the DKO world;
2) You can't kill the other realm freely;
[What i want improved]
1) Once you choose a Realm, you can freely PvP against the other realm, whenever the map zone is, without incour into death penality, exp loss or whatever;
2) When you kill an enemy realm player you gain reputation points;
3) If it's not already in the game, hide the enemy player name (like was into another game i used to play).
4) Change the name format of the enemy realm that will be something like "NameFaction Soldier" (Example "Eos Soldier" or "Dione Soldier") for everyone, instead of add the ranks.
[What i would add]
What i said on the "What i want improved" section plus the following points:
1) Add more RvR zones that give bonuses;
2) Add a sort of Realm Relic somewhere in the map for each realm with the name of the realms (Example "Eos Relic" and "Dione Relic"). The zone must be fortified with some guards and something similar to a really little castle, so people can also assault the enemy relic. The relic will give some Exp/Drop bonus or something that can make the interests of the players to do it.
3) Add Realm buffs for each realm. Each character will have a special realm buff that differ from the other classes on the same realm and obviously the other realm will have something other.