Part of issue with 15 is the graph displays. It is very slow when I scroll, especially if I have multiple lines on the same graph. Might be some setting I can alter to change that I am unaware of or some partial display incompatiblity with my OS or display drivers. However prime has major limitations regarding many of the things I would expect to work that do in 15 such as the above.
Edit: It appears to happen greatly on any zoom that isn't the defualt of 100%. However, my monitor resolution is defualtly very high; and thus is difficult to see the sheet without a zoom.
Thank you both for the quick and helpful responses.