Based on Razor-Qt licensing policies that I read, the author of Razor-Qt prefer LGPL over GPL.
How the merge of LXDE and Razor-Qt will affect the future of LXDE-Qt? Will it also prefer LGPL over GPL.
I suggest both developers should consider it earlier before everything get more complicated.
My opinion is to prefer LGPL over GPL, as it will help wider acceptance for LXDE-Qt especially from corporate support that may interested with LXDE or from non-Linux operating system that avoid GPL as possible (e.g. FreeBSD).
Just for information, there are many notable projects which avoid or switch their license from GPL to more relaxed license for wider acceptance reason : VLC, GEGL, ApacheOpenOffice, SDL, PySide, etc.