Even though this took so long and I wish the chapters could be a weekly thing instead of monthly, this is a really good development! They're both very career focused yet deeply in love with each other. Being actors then starting a relationship probably isn't the easiest thing since Ren is extremely popular. But all the misunderstandings are cleared up and they finally know that their love is mutual. This is actually cuter than openly dating because they'll be around each other behind the scenes. They're comfortable and assured that their love is true, so this will be so sweet to watch when they get time alone away from paparazzi and fans! Like a secret romance and Ren can slowly open Kyouko up to the idea of being with him by treating her the way she deserves.
I know people were hoping they'd date, but this just seems like the more logical approach for them. Either way, they'll be supporting each other and know they can talk to each other instead of Kyouko going "but he's my senior!". It breaks that senpai wall down and allows them to grow closer.