AbdulAlhazred
Legend
How about you give us some examples of scenarios with a step by step run through showing us how 4th editions is better?
I think people have already done that, but lets say you have a scenario where a character wants to cross over a chasm of some sort and attack an enemy on the other side. In 4e you could instantly model this on a charge, combine a movement with an MBA, and possibly trigger various other things that come about from charging. In the fiction the character is leaping onto a rope swinging from above and then dropping on his opponent.
The DM consideration will be something like "OK, this is a situational stunt", essentially a 'terrain power' from DMG2 though often it hasn't been formally written up before hand, noting that it COULD have been written up in power format earlier. So, it can be equated roughly to an encounter power. Using the analogy of the charge the DM can ask the player if he is associating a power use with this, or just going for the built-in MBA-type attack. If the player has some specific power to use, then whatever the stunt's effects are would be building on that.
Now, the next question is, what's the DC for this, and what do success and failure represent? The best and simplest approach here is to just proceed with play as if there was no improvisation. That is to say the character can do his normal charge, but consider the swinging on the rope to be a hazard, so give him an Acrobatics check to get it right. The usual consequence being 'knocked prone' for these sorts of terrain (drawing from various examples in the DMG). Suppose the player is expecting to achieve something better than an MBA, this is an 'encounter' level stunt after all! He describes swinging as high as possible and plunging down on his opponent point first. Fine, now we can make it a hard DC check, and give him a restricted damage expression for damage output, and if he fails he slams down into the ground next to his enemy and he's prone AND dazed.
Now, depending on the level of this whole thing you could also add some sort of effect here, a high level fighter coming down like a bolt of thunder from 50' above might stun his opponent if he hits, or do half damage even on a miss.
I could get more specific, but this is all just building on what is presented on Page 42 in a very straightforward way using the procedure there.
LARGELY, you'd do something similar in 5e of course. It just lacks some finer concepts like limited and unlimited damage expressions. Oh, they have a couple of damage expressions, but they seem oriented towards damaging PCs, not PC damage OUTPUT, and the concept doesn't wind its way throughout the system as it does in 4e, where its quite clear that heroic tier powers are 1d/2d/3d with some variation and progression .