Welp... I'm personally expecting him to put no more effort into anything with Yui than he did with Honoka- which means... not enough. We already know Suzuka and Yamato still love each other, based on the reactions at the end of last chapter, she just can't bear dealing with the relationship while separated, I think, while leaving it in the state it was at the time. He has not once lost that love for Suzuka before, and I don't expect him to lose it now, either -just, potentially, suppress it, just like with Honoka. If things happen with Yui, it'll essentially be one-sided, ultimately, but they'll go through the motions, anyway, until he finally pushes her away. Maybe.