Apart from the fact the LQG doesn't really have any well accepted theory of how to put matter and particles into it. In theory in LQG can two bosons occupy the same space? Because of course if you put two much energy into a small space you just get a black hole. And so if particles were some braid or structure in the spin-network, would this forbid two of them being in the same place?
Because LQG quantizes area. So how many bosons can fit in this area?
I saw an interesting video from Susskind where he shows that a boson must have a wavelength smaller than the event horizon of a black hole otherwise the boson won't "see" it.