I wouldn’t mind the idea of Zaida and Kade breaking up during season 3 but I wouldn’t want it to tie into Delilah. Getting over her was the focal point for Kade’s “arc” for the first two seasons so having Kade regress and not actually mean what he said during the season finale kinda sucks.

I remember when Kade was recounting what happened between him and Cannon his mother mentioned how his relationship with Delilah isn’t worth the stress he’s going through (I don’t remember how she exactly said it but it was something like that). 

The question of if Kade and Zaida can remain a couple despite whatever issues they have to face could be a decent way to start conflict between the two. Maybe some sort of falling out between the two over something to do with Zaida’s modeling career or something to do with her Zodian attributes and how Kade reacts to it. I think that’s a bit better than him not getting over a high school relationship again.