which settings am I changing here to reduce lag? All of the settings you checked are the same as mine, except for using OneNote 2013 as the default.If it is struggling with heavily inked pages you can check your performance settings...under Options...Advanced:
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Also turning off Pressure Sensitivity will reduce the memory footprint of the ink.
Also there's another issue that I have not mentioned:
When using the lasso tool to select some text, sometimes the lasso woould disappear and I would have to make another circle around the text. I thought maybe this was the battery or I was not pressing down hard enough but neither was the case. Any suggestions?