I really love the primals fight. It's like a short 15-minutes bursts of adrenaline, especially parts where it's hard to know whats going with all the flashing things and the aoes and you're new to it. Until of course, you learn the phases and habit takes over.

In extend of making Savage mode of coils and Extreme mode for trials, I would like to suggest a combination of Primals fight in one Trial.

For example, Ifrit and Titan in one large arena against the 8 of us. Of course, there will be new mechanics and things like a combined skill of both of the primals. Something like that, anyways.

It's a suggestion, but its a way to make old content fit into a new situation, and not recycle old situation for new contents.

"Hey guys... you keep being killed by these adventurers types?"
"yeah...."
"Why don't we.... team up... and smack them together?"
"..."
"And bring the other bros and sis too. Eight of us against the eight of them."
"....Why didn't we think of this BEFORE???"

Of course, it's just an exaggeration.