Fan service.. Give us tactics job system :P lol
Been lurking - you guys are coming up with some cool relationships between classes. Though I still fear that using two per one (or using "addendum jobs") is decreasing individuality and total potential of a job.
Samurai being able to use a polearm makes sense (and bow) - samurai not being able to use Katana .. you are right no sense - the wrath of fans would ensue lol.
Parivir, Ronin and Samurai are all really related - if this is a 1to1 (1class for 1job) I think you could use Parivir/R to Samurai, but I dont see Parivir/R mixing well with another job.
Really.. SE FFT.. FFT.. lol You can still keep classes and job structure - only difference is the "addendum part" so that a job is its own (someone said addendum once to describe the current system, I'm keeping it

)