I agree, it feels like a couple more paths have opened up since the last Shoichi update. There's obviously path C, which is the bad route, but there's also Path A and B, which are the good and neutral routes respectively. Also gotta keep in mind that in both paths A and B, you have to choose what kind of advice you want to ask from Saya, which means there's A 1 and 2, and B 1 and 2. Edit: going off from your original question, it looks like its gonna be paths A/B, then C. (INCOMING SPOILERS IF YOU HAVENT CAUGHT UP TO ALL PATHS.)
In both A and B, you still go to that date at the lake, but path C has gone in a completely different direction. Even if WOTB makes it so you somehow still go to the lake date (though I doubt it,) Yuu and Sho quarreling made them both realize that their relationship isn't gonna work out if they dont communicate properly.
After a long time of avoiding each other, they finally discuss the problems that they had, even going as far as Yuu telling Sho that he's pushy (without the need of Saya's advice, but that scene doesnt even appear in route C.)
You can tell how conflicted Yuu felt with the situation because before he made up with Sho, Yuu thought about how much he missed Sho and even wondered "Is this what love feels like?" (Btw, this was when Jun finds Yuu spacing out.) At the end of day 29, Yuu says "I love you" to Sho, which goes to show how much their relationship has grown, even after their quarrel.
Sorry I went out of course and kept rambling on, but I just love discussing things like these with other people (plus I just love the storytelling of Tennis Ace as a whole.)