Were you using the same drivers with 8.3? I'm guessing they weren't ASIO.

CakeAlexS
Were you using the same drivers with 8.3?

Yes, same drivers and interface.  

Well just make adjustments using your interface software such as mix control, as everybody has stated. Ta.

He's talking about manual offset, This is not driver latency settings, Sonar automaticly adjusts your recording of new tracks to match the timing of the playback you hear. I beleieve it actually plays back your already recorded track ahead of time so that the latency of the audio coming in will be in the right place. 
You can test this accuracy with a loopback. 
Re record a transient rich track like a snare and put the new track beside the original and zoom in. 
I've always found it to be right on. And that's even with a Tascam interface. 
 
 
 
OP- and why didn't you read scooks post. He's telling you it is still there. He's told your twice now. So he answered your question in #6. 

I am using the 2i2 at present. I DO change setting for mixing/recording. 10ms for mixing, 3ms for recording. No issues this way. If I don't, I have problems mixing, and latency issues while recording. I am about to move up to 18i8 for more inputs/outputs and features, but also because of the mixcontrol software, which is not available for 2i2, and the added control over buffer selection that is not available with the 2i2, which is almost the lowest in the food chain.
 
As others have pointed out, you can adjust manual offset, just like 8.3. The features you are talking about that you have lost, are not lost, dependant upon what interface/software/driver is being used. It's individual to your hardware.
 
Hope you work it out. You have been given excellent advise above already

Ah got you Cactus. Yep.

Ummm... I think you totally missed the point. It's pretty obvious that there are multiple reasons for latency. But Sonar Producer 8.3 (my previous version) had the ability to manually compensate for, as far as I can tell..., pretty much anything.
 
i.e. Sonar X3 still has the ability to change buffer length. Well... you'd likely change buffer length due to some reason outside of Sonar as well, right ?
 
I ain't no recording genius, but seems to me if you've got a great feature, why get rid of it ?

 
You are mistaken Latency for Manual Offset. X3 still has manual offset. You'll just have to do some tweaking to get the offset to where you are happy and the same settings may not work that you had in the last sonar versions. There are many variables to take into account , when doing a manual offset. 

CakeAlexS
Well just make adjustments using your interface software such as mix control, as everybody has stated. Ta.

don't have a mix control

Cactus Music
He's talking about manual offset, This is not driver latency settings, Sonar automaticly adjusts your recording of new tracks to match the timing of the playback you hear. I beleieve it actually plays back your already recorded track ahead of time so that the latency of the audio coming in will be in the right place. 
You can test this accuracy with a loopback. 
Re record a transient rich track like a snare and put the new track beside the original and zoom in. 
I've always found it to be right on. And that's even with a Tascam interface. 
 
 
 
OP- and why didn't you read scooks post. He's telling you it is still there. He's told your twice now. So he answered your question in #6. 

Sorry, no, the manual +- offset adjustment is not there.  It is now only a buffer length adjustment.

I certainly exactly where steve said it was for me?? Might be the 2i2 driver is different than my 6i6 which has mix control.  as said by Mac. But as far as I can tell the manual offset is a Sonar thing.
I'll fire up my Tascam system tonight and double check. I just installed W8.1 so might be a while before I got everything running agian on that system.
 
May I ask if the loopback is showing your timing is off? Mine is bang on.