That's a simplistic way of seeing things. This is a 2v2 so Minato can either camp in Susanoo, or have a clone teleport Itachi (inside Susanoo) to him, where it manhandles Naruto or his clones in close combat. Either way, Naruto can't land hits on Minato since he will react and teleport away. Either to Itachi, kunai markings, or his clones. So yes, S/T barrier still is an asset that can be used in this battle. Kirin does nothing for Sasuke since Yata tanks with zero damage.
Naruto can't land attacks on Minato, so they stalemate as well. Worst case (and most likely) scenario is that the golden boys end up outlasting.
-Chou FRS is warped away with Minato's barrier.
-Totsuka cuts off Susanoo limbs if Sasuke tries to hold Itachi in place.
-Susanoos entering close combat pose a threat to Sasuke since that leaves him vulnerable to getting his Susanoo warped away.
-Chakra arms going underground are read with sharingan and evaded, or sensed by Minato who teleports himself and Itachi away.