The Fighter has to reach deep into his inner core to unleash his most powerful attacks. Hence he has to rest before he can use them again. Note that he can use a Daily at 8am, , rest to 2pm, then use the Daily again, so he can use them more than once per actual day.
In fact he can use a Daily at 00:00, rest 6 hours, use it again at 06:00, faff around for 12 hours to 18:00 then rest 6 hours to 00:00, the use the Daily again, 3 times in just over 24 hours.
And they said the 15 min game day was dead.
So my bad, he can use it 2-3 times if he immediately takes a 6 hour nap, does it again, waits 12 hours, takes a 6 hour nap, and does it again. Any player who tried that at my table would probably be left in the inn while the other PCs played on. So lets get over the technically moment and get to what is meant, once per day of adventuring.
If it's at-will, then it can't (while being mechanically balanced) replicate an encounter power which (for example) does the same damage as a basic attack to multiple foes, at no greater cost in the action economy.
Sure you can. SW saga did it with a hit to accuracy (-5 to hit, two attacks possible). It wasn't the best (the penalty was too high, a complaint I can apply to a LOT of Saga's math) but its doable.
The issue is the ADEU proponents are reverse engineering a problem out of the solution they've already picked. The question isn't "How can fighters gain dynamic abilities and yet be balanced?", its "How can fighters have abilities on par with wizards that don't require additional rolls, don't sacrifice attack accuracy or damage, don't require a chain of feats to learn, and work whenever the player wants them to as long as the rules says he can use it?" Well duh, I WONDER what your answer is going to be?
I didn't say that there's anything wrong with such approaches. I explained why I don't like them - just as you apparently don't like a metagame-heavy resolution system. Whether or not 4e can handle them is a matter of some debate. Different 4e players posting on these boards have different views, and those who do play with random encounters and dungeon exploration use a range of techniques within 4e.
But as I said in my earlier post, I don't see what any of this has to do with my observation that not every day has fighting in it, and not every day with fighting in it sees every daily power being used.
Not every day has fighting in it, but every day that DOES looks remarkably similar. A 5th level fighter could start with Dance of Steel, Steel Serpent Strike, and then spam Tide of Iron and/or Cleave for the remainder of the fight. If he's starting to lose, he might kick in Boundless Endurance and use either Crack the Shell or Comeback Strike. Then the next fight he has the exact same options. And the next one. And the next one.
I guess there is no rule saying a fighter HAS to open with his encounter powers. Or use his daily at all, or even use his at-wills rather than just go basic attack for fights. And yes, Page 42 exists (but is, as Obryn points out, the opposite of fiat as its COMPLETELY mother-may-I). But in my year of playing 4e, I never saw a fight that didn't go as discussed. Foe is slowed, foe is prone, push, push, cleave, push, push, push, dead.
Actually, re-looking over the PHB powers, I'm shocked on how many are "Add your dex/con to hit/damage if using weapon X". I had to dig pretty deep in the PHB to find powers that DID something other than add extra [w] or adding an ability boost if using a certain weapon. Are you sure 4e fights were as dynamic and fiat-filled as you remember them?
If by "the universe" you mean "the game rules", then yes. That's the nature of rules. If by "the universe" you mean "the ingame fiction" then no - to say otherwise would be to confuse ingame and metagame.
The ingame fiction has to adjust to the use of the metagame. Otherwise, there is no way explain what happened from the character's perspective. From the in-character perspective, Bob the fighter knows that somehow during most fights, he can knock one foe prone. It happens nearly every fight. Just that one foe too, it never seems to work if he tries it on another foe in that battle. But the next battle, he manages to do it again, but just the once. Sometimes, it doesn't work, so he never bothers to try it again during that battle either. Just that one foe gets knocked over...
Hey, 3e has it own warts (All hail Trip Monkey, King of the Prone Status) but as for Next, there has got to be a balance between "So good you use it every round", "So useless, you never use it" and "So good, but only works once per battle".