I can see the value in the suggestion, and I can understand how some would want to be able to experience the EX primal fights at the level of their initial release. That said, as somebody who's done pretty much every single EX primal on-content since the advent of ARR, and who's spent a pretty good chunk of time in PFs, let me say this: the daily rewards for clearing EX roulette would need to be absolutely astronomical before I'd even consider queuing up. I'm talking rewards that even MSQ roulette would look at and be like "daaaaaaaaayum."

If you want to experience these fights at minimum, or at least synched ilevel, you would be far better off trying your luck in a PF or by gathering FC people to give it a swing. Random people absolutely cannot be trusted with regularly, consistently being able to perform at even an EX primal's level of difficulty. Especially since so many people that aren't prepared for the difficulty, or don't know the fights would just queue in with the expectation that, as with all other content, the other 7 people would be able to drag their lifeless bodies across the finish line.