Powers which allow normal movement between would just allow a higher effective speed the round they are used it is more like monk than ability that way used
Some of it is, but there is the 'shoot and stab' ranger build, for example, which is pretty much based on making attacks while moving. Also a rogue build which is designed to do kiting/sniping that gets some similar abilities. There are also a range of powers for various martial classes (I think all of them have at least a couple) that provide similar capabilities wrapped in a power.
Anyway, yes, there are 'make an attack and shift a square' things as well, coupled with a move action they provide similar capabilities. There is of course also the monk with its combined powers concept which provides some similar capabilities.
In any case, I'm not sure why anyone was thinking that this concept would pose any issues coupled with shifting. Shifts are a lot more expensive in terms of how far you move, but they serve a different purpose. Obviously players will still need to make choices and balance possibilities of provoking vs getting the spot they want to be in, even with a split-move concept.
Mostly I just think the concept is more effective in the context of a game where it was incorporated from day one. 4e could have been that game, and you could simply denigrate powers and whatnot that provide a similar capability and go on ahead and implement it in your game. It won't really HURT anything. It makes a degree of kiting possible, but with a total of 6 or 7 squares of movement to play with that isn't going to be super effective anyway (you cannot get out of charge range of any realistic opponent by moving 4 squares after an attack, or usually even 6).