I only brought up WataYuri because its the only yuri airing in spring -- unless you want to count Birdie Wing S2.
Birdie Wing is obviously yuri, it's just that it's an action comedy as well. There's nothing vague or plausibly deniable about it. Eve is a chick-magnetic Casanovette, but she also can't keep herself off from touching and egregiously flirting with her rival, who in turn has a ginormous crush on Eve and gets a brain meltdown every two minutes about it.
Thankfully it is an original story, so writers can (hopefully) just go all the way there.
Problem with adaptations is that they can struggle where to end the last episode. Many serials don't have convenient dropoff points, and don't want to give up final resolution to ongoing story, which might affect sales of manga or LN negatively.