Convert me from Acid Pro 7?

Sorry I'm puzzled. I tried your RPP - I don't have Kore 2 but I simply loaded Sampletank instead and it works on all channels and accepts MIDI input on all channels. Since you have the same problem with another VSTi, I can only assume that something is wrong in your setup, maybe another MIDI device hogging the first 3 channels or something. This may or may not be related to the crackling problem (what is your audio interface?). On the bright side, you made that template itself certainly right.

That's always possible...but since a lot of people are using multi-out VSTi here (think of all the EZdrummer/BFD/SuperiorDrummer/whatever users), that should be known. Seriously strange stuff, I just can't imagine why the feedback routing template wouldn't work while the normal one does... :(

Ok, so how does one log a bug. Is there a tool that Reaper uses to collect config info so that the devs can easily repro the bug?

Simply post it in the Bug Reports forum, with - a description of the problem, the Reaper version and the involved plugins - system information - exact steps how to reproduce the bug