As you can see in upcoming mmo's, the emphasis is slowly moving from character skill to player skill. So it will matter more how good the player behind the computer is, and not just how much strength/agility/intelligence his in-game character has. I think this is a very good evolution. But now my question is: which parts of current mmo's can be improved by involving more player skill?
A first thing I can think of is the character build: give the player a lot of choices, so he can build his own, unique strategy and there will never be two players with exactly the same build. The general rule here is: the more choice, the better, as long as the different choices are properly balanced.
Another thing where player skill should definately be more involved is crafting. I've seen a lot ideas about crafting mini-games. But I think that there should also be the opportunity for players to experiment with new materials and different proportions of those materials, instead of having fixed recipes for everything.
The most important part however, and perhaps also the most difficult, is combat. I think everyone agrees when I say the time of auto-attack-->afk-->loot is over. But what is coming in it's place? There are two ways to involve player skill into combat. The first one is twitch: the player with better reflexes, will win. Some upcoming mmo's are trying to implement this with an fps-like combat system with manual targetting and no auto-attack. The second one is tactics: the player who makes the better decisions, will be the better player here. For this system to work, there obviously have to be a lot of non-trivial choices during combat. Choices that have a lot of different possibilities that all have an unique outcome and have an impact on the combat. But for such choices to be made, the player has to get a little time to think before he acts. This goes however head-on-head with the first possibility: twitch. So when making a game, there has to be made a choice: what kind of player skill do we want to reward: fast reflexes or good decisions?
Now this is I think a matter of personal preference: it's the reason why some people play shooters, while others prefer strategy games. I will give my personal preference however. That would easily be the second one because I think in order to win a battle, you have to adapt to your enemy and try to counter his decisions. This can only be accomplished when the player has time and, more important, opportunities to do this. This is simply not possible when everything depends on the speed of the player.
To sum it up: Involving more player skill in mmo's is good, but it should be more in the form of meaningful decisions with maybe a bit of twitch. Please keep the pure twitch for shooters. I'd like to hear what you prefer: more twitch, or more tactics? Or do you rather have the old system, where the player with the most time spent in-game will have the strongest character?