While I am aware that LOVE follows the general principles of Lua in that we don't want to bloat the API with cruft, I believe that one feature severely missing from LOVE is a native GUI module. There have been several attempts to make various GUI frameworks for love, all of which fall flat (including my own). I've been tinkering around with love-nuklear recently and it feels like a strong contender for something that could be included natively with LOVE. nuklear itself is an ANSI C header-only library and love-nuklear is a pretty decent Lua binding for it.
I really think LOVE could use a native GUI module, it would help round off all the major features in a framework that we already have, such as networking and physics. I'm not necessarily looking for a fast decision here, but perhaps we could discuss this?