I truly wish 4e had avoided all the automagic push/pull/slide abilities, except in cases where they are truly justified, like if a power involves slamming into a foe and knocking them back (which should have been push X squares, but reduce X for larger foes).
All the rest, like Come and Get It should really motivate the foes to make their own decsion on their next round. It should include penalties if they don't. It could even state "foes who decide to attack any of your allies next round must attack you instead" or some such thing. No pull, no slide, no forced movement at all.
Which would eliminate almost all of this wonkiness in one fell swoop.
I smell a house rule coming for my game (or really, I smell maybe dozens of house rules coming as I go through the powers and make this kind of adjustment on most push/pull/slide powers that don't include actual magical compulsion or actual physical mass collision).
4e could have been a great game. But all this wonkiness chops it down from great to merely good. Fixing the wonkiness could restore it to great.
And I don't see how injecting a simple bit of realism into these powers makes them any less fun, so I don't buy the "don't think about roleplaying" or "they did it to make it more fun" explanations - there is a best of both worlds solution for 4e that would make the game immensely more appealing to all the players out there who aren't fully satisfied with the RAW, and usually without detracting one bit from the players who are fully satisfied. I wish WotC had tried harder for that solution so we don't all end up playing an infinite number of different house-ruled versions of 4e.