Will Honeybee legacy and honeybee plus support latest version of radiance 5.3a. ?
Where did you find the 5.3a?
The new [+] is developed with the 5.3a and some new Radiance features were added for the Honeybee [+]. But both HB [+] and Radiance 5.3a are still under development, and there is no public release for both yet.
The short answer is yes.