I wants to play too!
Here are the stats I'm using for my personally modified reforged Keenings. These are based off of a mishmash of stats between Dwemer and Daedric. I've also taken into account what an "average" artifact is like. I've also thrown in a healthy does of "because I can" into the mix.
Keening's ratio is 45, putting it behind Mehrunes Razor at 42.5/75 and the Fang of Wossname, at 75/150. So the modified Keenings should be pretty average. There are other things to consider, like enchantment. Sunder has a ratio of 105 and still has the awesome CE on it, so it's ok to give the modified versions a better ratio. But they probably shouldn't compete with Sunder in pure damage output, because seriously, Sunder implies that you're slicing and chopping your opponents to death with a freaking carpenter's hammer, and that's just awesome.
Also, Keening is slightly heavier and more durable than an average Dwarven Shortsword.
Spear:
Weight = 16
Health: 1550
Speed: 1.25
Reach: 1.8
Chop Min|Max = 12|34
Slash Min|Max = 8|21
Thrust Min|Max = 27|57
Reasoning: I did say that Keening should be "average". But looking at artifact spears, one is a reward for a Daedric quest. These tend to be crappy in terms of damage. The other one is a jinkblade. Looking at the Daedric Crescent for comparison, the enchantment on a jinkblade makes up for the lack of power. Because of this, I have elected to give the spear a ratio of 71.25, putting it at the level of a fairly meh longblade. Considering that the Spear of the Hunter equals the Daedric Crescent in actual damage output, this seems to be a good, "average" output. Also, I love spears and Bethesda hates them, so YMMV. Slightly heavier and more durable than a Dwarven Spear.
Long Blade:
Weight = 30
Health: 3700
Speed: 1.5
Reach: 1.0
Chop Min|Max = 21|55
Slash Min|Max = 15|44
Thrust Min|Max = 18|35
This form has a ratio of 82.5, which is more than the spear (as it should be, lacking the range advantage) but pretty average for an artifact longblade. It is one-handed, which helps, but remember that Hopesfire is, too, and you aren't forced to wear heavy armor when wielding that. Because there's no Dwarven Longsword, I looked at Keening vs Daedric shortblades, and its health is between that of a tanto and that of a shortsword. So I gave this blade health between that of a longsword and that of a katana. A Daedric Longsword weighs almost 2.5x as much as a shortsword, so I went ahead and gave it a weight just over 2.5x that of kening to balance it downwards a touch.
War Axe:
Weight = 38
Health: 4200
Speed: 1.25
Reach: 1.0
Chop Min|Max = 24|67
Slash Min|Max = 15|49
Thrust Min|Max = 8|21
A Daedric War Axe is a slightly nerfed version of a Daedric Longsword. This ware axe has a ratio of 83.75, which edges over the sword because swords only think they're cool. It's slightly slower and more powerful to throw a bone to the first-strikers. I also gave it higher health than the longblade because Bethesda's sword/katana fanboyism needs to stop, and there's really no reason the axes are so far behind the swords in terms of durability.