That's alot more damage than Twin Strike! Without any feats a scout with an axe in their offhand can do 1d8+1d6+12 if both attacks hit. Even if one hits, it's +6 damage That's way better than what Hunter's Quarry can do. This is assuming they don't have the ability to hold a one-hand weapon as an offhand weapon. The average would be 20 damage. Say the scout only hits with their offhand weapon. that's 1d6+6 or 9.5 damage average. A cRanger would do 1d10+1d6 or 9 damage with one hit.
A cRanger with two broadwords can do 2d10+1d6 damage. The average damage for them would be 14.5. Why would anyone ever want to play a core ranger? Even if we went with a light blade the scout will out damage the cRanger because of the extra +1 to hit with BOTH weapons.
This is total power creep. I have to ask why, are they removing all the flavor of daily and encounter powers for massive damage? I have to say that I hope the class compendium that has the ranger in it will give cRangers the same boost.
First of all the eRanger will never hit with just his off hand weapon. Check the Dual Weapon trigger again. For the sake of argument let's pretend the following eRanger:
Dex: 18 (+4)
Hit: 50%
Long Sword/Hand Axe
MBA: = 50% * 1d8 + 4 (Dex) + 2 (off hand Axe) = .5 * 10.5 = 5.25
Dual Strike: = 45% * 50% * 1d6 + 4 (Dex) + 2 (off hand Axe) = .45 * .5 * 9.5 = 2.1375
DPR: = 5.25 + 2.1375 = 7.3875
Dex: 20 (+5)
Hit: 55%
Long Sword/Hand Axe
MBA: = 55% * 1d8 + 5 (Dex) + 2 (off hand Axe) = .55 * 11.5 = 6.325
Dual Strike: = 50% * 55% * 1d6 + 5 (Dex) + 2 (off hand Axe) = .5 * .55 * 10.5 = 2.8875
DPR: = 6.325 + 2.8875 = 9.2125
Dex: 18 (+4)
Hit: 55%
Long Sword/Short Sword
MBA: = 55% * 1d8 + 4 (Dex) = .55 * 8.5 = 4.675
Dual Strike: = 50% * 55% * 1d6 + 4 (Dex) = .5 * .55 * 7.5 = 2.0625
DPR: = 4.675 + 2.0625 = 6.7375
Dex: 20 (+5)
Hit: 60%
Long Sword/Short Sword
MBA: = 60% * 1d8 + 5 (Dex) = .6 * 9.5 = 5.7
Dual Strike: = 55% * 60% * 1d6 + 5 (Dex) = .55 * .6 * 8.5 = 2.805
DPR: = 5.7 + 2.805 = 8.505
At some point the +1 to hit will be better than the damage (higher static damage). Pick up Bastard Sword and Rapier if they don't have them. Start with an Axe and likely transition around level 8-10 or so.