Have you tried installing a slightly older driver for the Wacom tablet?
Using the 2014 driver has not changed anything.
Previously the computer was not creative cloud, or 10.10. So arguably either could be causing the issue. It was a nice thought, however doesn't help.
I'm struggling with exactly the same problem in indesign CC vs. wacom intous pro and can't find any solution for it. So maybe you already solved it. In case of, it would be great to share an update to the issue here. Thanks a lot.
I also have this issue, only on my windows machine though strangely. Works fine on a Mac. Have to use a mouse for Indesign when using Windows its so bad.