Pinotage said:Without having to retype what I mentioned in another post, I don't think powers alone define a class. Or at least I hope it's not the case in 4e. I might be wrong, but we've seen abilities in classes that are not powers, and the multiclass doesn't get these. I also think that many powers are going to be very similar in a way, just affecting a different defense, for example, and that to make feat multiclassing work you'll need to very carefully select the powers you want. Is a fighter with the rogue multiclass feat and the tumble power a rogue? I don't think so. Having the ability to tumble doesn't define being a rogue.
Pinotage
But said Fighter would also be Trained in Thievery and Sneak Attack 1/encounter, assuming he only spent the two feats required to gain his Tumble ability. A Fighter that tumbles into the thick of melee and stabs someone in the kidney (or liver, spleen, you pick the organ) sounds pretty Rogue-ish to me. Two more feats will give him what I imagine would be equally Rogue like abilities, which as others have pointed out, will constitute a large percentage of his abilities. And since he can trade out his Rogue abilities every level, he can always pick from the cream of the crop, and even drop off abilities that don't work out.
What doesn't sound Rouge-y about that to you? What do you think he needs to be more Rogue-like? The ability to catch people flat-footed? There was another feat that offered that ...