(Describe your feature request in a way that a Bitwig newcomer can understand. Optionally, fill the sections below. If you don’t have time now it’s ok, you or others can work on this draft later. For more information, see Writing a good feature request)
What problem(s) would this feature resolve?
How does this feature fit in Bitwig as a product?
Is there already an alternative way to achieve this on Bitwig?
Could it be implemented using Bitwig components or APIs, without Bitwig team’s support?
Could it be provided by an STV or something else reasonably integrated with Bitwig?
If I’ve understood correctly, I think you can do this stock. If you have a Note FX Selector you can stack up arpeggiators and then automate which one is selected and thus which pattern plays. If this is different to that functionality somehow then lets see if we can get the templated filled in so we can promote this to #features.