I enjoy Rift immensely, but using 8-10 keys just to perform raw DPS and almost none for Utility or CC is a very boring system.
I will compare my Rogue in Rift to my Rogue in Warcraft.
Simple Combat Rotation for my Rift Rogue:
Time Bomb, Fragment Bomb, Spike Charge x 5, Detonate, Caltrop Charge x 2, Annihilation Bomb, repeat.
Simple Combat Rotation for my Warcraft Rogue:
Sinister Strike, Revealing Strike, and Eviscerate for a finisher.
Now from the outside looking in, it appears that World of Warcraft is way too simple, and some would argue that it is too easy. For those who have played both games, however, they will realize that Rogues in World of Warcraft have much more Utility and Crowd Control that they are expected to use.
In Rift I feel like I have to hit a bunch of buttons that essentially do the same thing. It's like having to shoot six guns instead of one.
Utility for a Rogue in Rift:
Utility for a Rogue in Warcraft:
Cloak of Shadows, Vanish, Feint, Tricks of the Trade, Recuperate, Smoke Bomb, Disarm, Blind, Sap, Sprint, Snare, Multiple Stuns, Interrupt on a 7 second cool down.
When I am playing my Rogue in Rift I feel like 99% of my focus is spent on trying to keep a lengthy, and complicated rotation going.
When I play my Rogue in WoW, my combat rotation is fairly simple but I am constantly on the look out for critical interrupts, CC, and utility that is not just a benefit to the group, but is a requirement.
This makes the skill cap in WoW much higher.
Lack of Utility:
In Rift, when I join a group or a raid, the only thing that is expected out of me is button-mashing 8-10 buttons that do DPS.
When I get invited to a Group or a Raid in Warcraft, it is generally because the Rogue class has a utility that the group NEEDS. You couldn't even clear BWD, or Heroic BoT without a Rogue.
Lack of CC:
In Rift there is a general lacking need of CC, so even when a class has it, he rarely gets the opportunity to use it.
Warcraft is the opposite. When ZA/ZG was released, I was the most geared Rogue on the entire server, and was still regularly expected to use Sap or otherwise the group would wipe. This extended to clearing trash in raids too -- CC was massive in every raid (Circle = Sheep, Square = Sap, Triangle = Trap).
In-combat CC -- I can't count the number of times a patrolling sentry was heading towards my group and I CC'd it with blind, and saved the entire group. This is not unique to the Rogue class. About 80% of the classes are expected to fulfill this role (Hex, Sheep, Trap, Cyclone). Unfortunately, Rift doesn't offer any class these opportunities.
Lack of Interrupts:
In Warcraft my Rogue is regularly expected to interrupt, and not doing so can cause the entire group to wipe -- even in a 5 man group. In Rift, a few raids require an interrupt, but it is rare. I have never seen a 5-man boss, or normal mob that requires regular interrupts to defeat.
TL;DR -- On Average, Rift requires a massive amount of buttons to perform a basic combat rotation (Raw DPS), and 0 buttons for interrupts, crowd control, or valuable group utility.