The most important thing is that you can't RS Gold wilderness realms. Never. The excitement of the wilderness provided one thing that PvP/bh realms did not have, and it was the most efficient handling I have ever seen.
Pvp meeting pve players. By having limited resources like rune, treasure trails, dragons, the abyss, and bosses in the wildy it offered non-pvp players the chance to enter potential pvp to get rewards, however, it was not mandatory or required in any way. The above mentioned points for quests are valid as everyone should be able to access the content. However, making certain worlds safe defeats the purpose of the quests. This is the thing I'm most worried about If there's a safe world to not get attacked it defeats the point of it all, an element of risk.
Runecrafters should not use hazardous abysses, since there are perfectly safe ones just one hop away. Zombie-hunters in armour can hop over to a safer world once they have left the wild. Actually, this could be done for any kind of world. This is a plea, don't promote the notion of "safe" worlds or the half-assed wilderness. it defeats the point and the fun of being in the wild.
Wilderness And Free Trade
What will happen to the things designed to replace the wilderness? A quick background... GE was established about a month prior to the notorious updates that were meant to replace free trade.
Ancient warriors' equipment- Was originally made to resemble statuettes. Due to the low PVP drops of the time the ancient fighters equipments luck drops also, which meant you could have a shot at getting them and making money (the economy at the period was very low).
Statuettes- Buy Old School RS Gold with the brand new bounty hunter system, these statuettes offered a chance for decent loots as well as cash for those who pkers. Estimated potential- Introduced with the bounty hunter's new system, it gave players a feel for their chances of good loot. PvP worlds were designed to replace the previous bounty hunters, which originally included a variety of worlds. But, they have been reduced to just a few worlds.

