It is strange idea, but if attract LXQt project to KDE community then it will be kool. This project is developing slowly and it not enough support.
Why do we need LXQt together with KDE? - I do not know. But not everyone has the modern or powerful hardware, for example peoples who live in less developed countries. Probably will not be able to use Plasma.
So it would be kool to have besides the usual flagship Plasma also a Lightweight desktop environment, that would be modern, beautiful and lightweight. Can also make KDE neon Lite Edition with LXQt desktop environment.
To contact with developers - email@example.com