Jeremy Ackerman-Yost
Explorer
Which is exactly what I mean as something "opaque to naive players."As a technical point, unless it gets specifically written you don't have to move at all to get the advantage, upto your speed means 0 move as well.
"Why would I use a move action if I don't want to move?"
You may not be mandated to make choices very often, but right at first level you have the option of making choices more often with the thief than the rogue.The key is not the number of choices, its how often a player is mandated to make a choice.
To start with, in addition to making your attack (which is superficially simpler than choosing an attack power), you have a selection of attack-affecting movement powers that you can choose in place of your basic movement.
We could call that a wash on total complexity, but instead of your decision being directly about your attack, it is about your movement. Cool, but it's a full layer of abstraction removed from the attack itself. This is inherently more complex than having those options built into the attack powers.
But besides that, there are up to two more choices that are new: "Should I apply Backstab to this attack I'm about to make?" and for some builds "Should I apply Power Strike to that attack I just made?" These are not "mandated" in the strict sense of the word, but are technically part of the decision tree every time. You can't simply ignore them without being a limp rag. Or, at least I hope not, for balance reasons. For all intents and purposes with the original rogue, these decisions are baked into your choice of attack power for the turn. So for the thief one decision has been broken down into 2 or 3. By your own logic, this is more complicated.
A first level rogue might have 4 or 5 attack powers to choose from. One decision with 5 options and a movement decision. The first level thief has a choice of 2 movement powers besides the normal suite of move actions, one binary (yes/no) choice and possibly another binary choice if they gave up one possible movement power. 3 separate decisions. At best, it's infinitely debatable if that's simpler. Heck, it's actually quite a bit more difficult to describe, if that means anything.