Don't take this badly, but your songs still need a lot of work before you can say with authority that LMMS is good for dubstep.
Your buildups are a bit too regular, the basses not powerful enough and I suspect you didn't really equalize much, because I hear lots of overloading (although that may be on purpose). Also, lots of dissonance.
Again, I don't want to bash on you. Just pointing a few things out.
The main reasons LMMS is not good for dubstep for me are the lack of vector-based automation (as it is now, it sort of sucks), the lack of ability to sync LFO speeds of the best synth (ZynAddSubFX) to the song tempo, and lack of ability to automate said LFO speeds of ZASF. After that, maybe the lack of a graphical equalizer, but Spectrum Analyser + LDSPA eqs work too.
These flaws exist, and while you can work around some, you can't around all, and that is annoying.