I would prefer rigid, if I want to fulfil a certain role then I will go and level that class up. I loved the Job/Sub Job system and I believe it provided enough flexibility to allow you to do other things. It was only a few things that broke the system for the most part (I'm looking at you Utsusemi). If you wanted to go solo /DNC, if you wanted to smash out WS's /SAM and so on.

I don't know why SE is trying to shoehorn this Job system on top of an idea that no longer exists. The Class system was supposed to provide the building blocks to allow us to create our own Job. Now they are limiting Cross Classing further, removing Physical Leve and then adding the Job system on top of it all and it just makes no sense.

Just change the Classes to Jobs and be done with it. GLA to PLD, PUG to MNK and so on and then just add a little thing to weapons to say "can be equipped by". So you can have a Sword that can be equipped by PLD, WAR, THF, DRK and RDM and then a different sword might be RDM only.