There are many ways to implement a game system without using daily or encounter powers.
The question is not if it's lazy or simple design, but if it's actually better gameplay to use the "Vancian" combat model? I don't want a game system that bogs me down with too many details. But I still want to have a complex game system with many ways to "style" a character or to run a combat. I want complexity without complicated.
The at-will/encounter/daily power scheme is considerably easier to handle then using Iron Heroes token system, or something akin to 3E tactical feats or Book of Iron Might. Yet, despite the simplicity in grasping the core concepts and using them, it still has a lot of complexity.
Do you know any systems that are similar uncomplicated yet still provide a lot of emergent complexity? If you look into all the material that the OGL and the d20 System has to offer, do you see anything that achieves that? Or do you just believe there must be something better, but haven't any ideas on how that would like? Or do you don't agree with the goals itself - complexity yes, complicated no? Would two yes or two nos be okay for you, too?
Now that martial abilities are in line with spells, almost any non vancian spell system would do, actually.
I already mentioned power points. They better simulate fatigue or ki than independent slots for each exploit. They are also more flexible but not harder to track and require some resource management. All of which i find more interesting, even from a "gamist" pov, than 4e safeties like set per encounter powers and action points.
Iron Heroes tokens were needlessly complex because of the different ways to earn them. Balancing that must be a nightmare too. A unified pool representing fatigue is simpler.
The true20 fatigue mechanic is fine too (basically, you can use fatiguing powers untill you fail a check an then need some rest) but the true20 powers themselves are a bit messy and could use some cleaning up (which is odd because the system is otherwise very elegant and streamlined)
I find the 4e system lazy because its apparent balance relies too much on powers being used only once per day or encounter, so that designers don't have to worry too much about broken powers being abused.
A balanced power point system wouldn't be more complicated but would certainly require more math and playtesting on wotc's part.
So they went the easy way, at the expense of realism and flexibility.
I guess this is why they copped out on AC as damage reduction and actual multiclassing too.
Not a fair trade, as far as i'm concerned, because I do care about "realism" and consider the hard math and balance part is what designers are paid for.
Off-Topic: luteciusm, when I try to quote your posts, each sentence or line is encapsulated by color (white) and font tags (verdana)? Do you know why? Because I can't really see a visual difference between "normal" posts and your posts. It makes it harder to quote you.
That would be because i'm not "normal"

Since the switch to enworld2, weird things happen whenever i post or quote something. Sometimes the text is black by default (hard to read on this background) so I turn it white. I guess that's what happened.
I had no idea it would show on the other side, because the font tags don't appear when I type or even when I quote my own posts (they did with enworld1)
Do they show up if you quote this post? because I didn't do anything special this time. I hope it's not some saved settings thing.