New Bamboo Pad CTH-301/K doesn't seem to be supported by linux kernel 3.18.6 and before.
lsusb reveals that its ID is 056a:0318.
Therefore, it is not usable as for now.
Would it be possible to add a driver for this model into the kernel, and perhaps also back into input-wacom?
The pen portion of that device should be supported by the Linux 3.19 kernel. We plan to add the necessary patches to input-wacom 0.27 as well, but it will only be able to work with Linux 3.17 and later.
We're still trying to work out how to get the touch interface to work properly.