Hi, Long story short. We have 3 basics problems with Look and Feel in Plasma 5.8 1. While support for dependencies was implemented in KDE Frameworks 5.29, one needs Frameworks 5.31 (yet to be released) for more or less bug free experience. And I assume that most of the l&f themes will use this functionality, without it l&f themes are useless. 2. Plasma 5.8 doesn't support some rather basic features like import/export panel visibility with js, window decorations etc, and I am using them heavily in my L&F themes. 3. Combination of the two above can result in an unpredictable behavior, including broken plasma session. As a mater of fact, some time ago, I received rather unpleasant mail from some unknown guy who said that one of my themes broke his Plasma 5.8.x session. I spent a considerable amount of my free time testing, promoting and recently writing documentation [1] for this feature and it is really demotivating when somebody is saying that "I broke his desktop". However what saddens me the most is the fact that I warned you guys about potential issues before Plasma 5.8 release in September. [2]. Either way it is up to you how are going to solve this "problem". In any case, I still plan to work on this, especially on the promo/documentation side of things.
Cheers, Łukasz Sawicki 1. https://community.kde.org/How_to_create_Look_and_Feel_Package 2. https://mail.kde.org/pipermail/plasma-devel/2016-September/058976.html