I'm having a lot of stability issues after upgrading to the new patch, but I contribute this to the 147 mods I have running. Is there a tool I can use to help track the causes of the instability and isolate whats causing the crashes?

You could try enabling the Papyrus log as described in the 2nd post of http://forums.steampowered.com/forums/showthread.php?t=2791993