Correct. I don't think of it as something SE intended, what stats would be best for us, or what you should be doing in general. This is a "corner case" of design decisions made years ago with very few amendments, is only achievable with end-of-expansion gear, it becomes mere trivia once they release the final anima step, then becomes even more irrelevant in a few months when Stormblood drops.
Ballpark 35 DPS (-> ~2669), a 1.3% gain over 270 relic BiS. I left crit alone for that estimate; that should bump it a little more.
It should be interesting to see what, if anything, SE does about this scaling. Obviously they don't want to explode the numbers in a fit of exponential madness, but a difference like that is hardly noticeable.