Would you please provide more details about the problem with Adobe Reader for iOS using Apple Pencil?
By "a big lag", do you mean that (a) the drawing does not appear right where you started (i.e. missing some initial drawing), (b) it takes a while for drawing to catch up with Apple Pencil, or (c) something entirely different?
We are actively working on fixing problem (a).
Your feedback would be valuable for further improving the Apple Pencil experience in Acrobat Reader for iOS.
It is problem a.
Sent from my iPhone
Excellent! We are working on it!
Thank you for the feedback!
We just released the new update (16.02.23) to the App Store on February 17, 2016.
The update includes the fix for the "big lag" problem with Apple Pencil.
Please give it a try and let us know what you think.