@esclapion: do not forget gvfs. this is the only package on my system, which requires gtk3. i hate it, but i do not find an alternative.
@ajslye: lxqt-connman-applet works fine. i use it for about 6 months now. it has problems with dark themes, but it works well.
but i agree with esclapion: connman is great, if it works for you, but it lacks some functions of networkmanager. some people do need these functions.
i have tested qt5ct before, but i did not know there is a lxqt version available. i will test it. thanks!