It would be a really nice feature to have the option to move the carousel by non-discrete amount but for the time being I am afraid that this is impossible. Currently the default movement behavior cannot be disabled and an carousel will always move when you click on an item.
To be able to support such scenarios we should modify the internal carousel logic but I am not sure if we will be able to start working on this soon. I will try something out in the next few days to see if we can introduce this without a lot of modifications and report back.
the Telerik team