Sounds like you have a loose spindle problem.
If the tool is "slapping" the job without moving, then that is first area that I would check.
As for ceramic cutters being 8 times faster... well they are certainly faster than standard carbide, but there is a whole lot of things that need to be taken into account first!
1. is the job stable?
2. is the Tool STABLE? i.e. NO chatter, as that will shatter the tool.
3. no huge cuts, these are generally finishing tools only.
4. Expensive, compared to ordinary carbide tooling.
As for making your machine like it is 8 times bigger... nope! definitely gets the job done faster tho