What MODS are you using if any? I'm using Aslain's and it has improved my game play.
http://aslain.com/index.php?/topic/13-094-aslains-xvm-mod-modpack-installer-wpreview-v4017-15-11-2014/
http://aslain.com/index.php?/topic/13-094-aslains-xvm-mod-modpack-installer-wpreview-v4017-15-11-2014/