Does it mean that no upgrade will be required prior to RCT HF?
This was true until recently.
A problemproblem was discovered with the initial version of RCT and it had been fixed in the point release 0.10.1. This means that everyone has to update the software to 0.10.1 prior to the HF date which is currently estimated to happen around 10-Jan-2017, and exactly at block 1220516.