Dragonlance always was low powered. Just compare the first books with some FR books, like the ones about Drizzt.
The Drizzt books were never intended to track a written adventure. The DL books tracked the DL adventures, including starting at low level and leveling up. The DL books did a pretty good job of describing what it's like to be a low level Hero.
Also: Raistlin (Wiz 20, Master of Past and Present), Ariakas (Ftr/Wiz 20, Dragon Highlord), Ariakan (Half-God Ftr 20 Dragon Highlord), Astinus (God's Aspect, Immortal), Fistandantilus, Kingpriest of Istar, Par Salian ...
Are these people PCs? Does it matter? If Elminster and the Simbul make FR "high powered" than you have to count Par Salian, Raistlin, etc. too. Fair's fair.
I would also like to point out that any setting where there are standing armies that ride Elder Wyrm Red, Gold, Blue, etc. dragons can not, in any sense of the word, be "low powered." Regardless of what level their riders are.
Lastly, Kaz would kick Drizzt's ass.
Mechanically characters in DL always had more restrictions than normal D&D characters. Magic was restricted through the Order and through a (optional) drain mechanic and in 2E there was even a level cap for DL characters at lvl 18.
I fail to see why a DL 4E couldn't adopt similar restrictions if they wanted to. Just because the current 4E rules don't map perfectly to Krynn doesn't mean that couldn't be fixed.
low powered and the 4E power system doesn't mix.
This is categorically false. They map fine. The simplest way to do it is cap level advancement at Level X (whether X=10, 15, 20, etc. depends on what you're aiming for). But there are other ways too. Rather than be small-minded about it and continually repeat the untrue you should try it some time.
As for DL being a point of light setting, not in the traditional sense.
You don't consider Solace a point of light? What about Tarsis?
the darkness was very lawful and not chaotic like in traditional PoL settings.
Takhisis was Lawful Evil? Who knew! </sarcasm>
Red Dragons, goblins, draconians - plenty of chaotic evil to go around.
The wilderness wasn't untamed and full of monsters
Of course. The comfortable resting spot outside Solace, the road to Haven, Darken Wood, the plains of Que Shu and Xak Tsaroth weren't
at all like that. Very civilized. No monsters at all.
Am I out of Chapter 5 of the very first book yet?
Instead you had had tyrants who ruled over the land, but the land itself was rather safe.
This is true. No one ever was attacked by monsters while traveling the roads of Krynn. Not in any of the novels I read.
Wait, no, the opposite.
Even the goblins and ogres in DL build cities.
Yeah, cities full of goblins and ogres.
Actually, check that. What cities are you talking about? The closest thing to a city I can think of was Neraka (which was a ruin from a previous Age) and the army camps set up by Draconians (not ogres or goblins). Ogres and goblins attacked, sacked, and occupied cities (like Vikings on PCP), but I don't recall them building any.
Are you sure you're talking about Dragonlance? Maybe you were thinking of something else ...