JBDS 6.0.1.CR1a B354 is based on Eclipse Juno SR0, but should be Juno SR2.
I know about the recent issue where TP wasn't updated to 4.22.2, so I would expect something 4.22.1 (still Juno SR2). But in fact it is SR0.
My assumption is that while JBDS BYOE can be installed on the minimal version of Eclipse, the JBDS installer should contain the maximum TP. I hope I'm not wrong here.
Now I also checked the previous build - JBDS 6.0.1.CR1 B338 and that is based on Eclipse Juno 4.2.1.