there is no smooth transition from lxde to lxqt at the moment
a hint may be - install the lxqt-packages from extra, you must decide between qt4/qt5.
i think, that a smooth transition may be a goal for the 0.8 packages, if the release of 0.8 is done, but i think that will be minor goal as lxde will be a full supported flavour as long it will be actively maintained and developed. But i do agree, that a package list may be helpful in the wiki