I love seeing people united by dubstep, I think it would be unfair if I just give a review to the entire track, since each one involved sound so different and has its unique concept of dubstep, so I took my time to rate and review each one's part with my honest opinions.

Neon-Skies: 7/10
The melody might not be the best thing, but the kick and most of percussion sound nice and punchy. and you managed to make the drop sound powerful with that dirty bass.

Garddie: 7.5/10
Good intro: the drop didn't hit as hard as I thought it would be. However, loved the warm chords.

4ttitude: 6.5/10
I liked the silent parts, gives an unnerving vibe and suspense not knowing what's coming. But there's too much reverb on the bass and is muddy af. Consider cutting the lows on your reverb and the zone around 200Hz on your bass. Nice percussion tho.

DJDUBSTEPCREEPER: 6/10
Mix sounds powerful, but I'm starting to think some growls sounds like random one-shots that came out of a Disciple samplepack or something. Not to mention the weird panning choices. It mostly needs a better arrangement

AETHERmusic: 8/10
Gosh, the piano intro got me hooked. Not very fan of the vocals, but your saw chords are clean. The only thing that dissapoints me is the snare, sounds very dim. I've noticed the phonk influence, so aside from the lack of the usual dubstep growls, the result still gets a bit of freshness blending two styles.

Dubstep-lover: 7.5/10:
Reminds me a lot like First of the Year. Great sound design. I think the drop needs a bit more variation instead of the metallic lazer bass thing sounding most of the time.

Creeperforce: 7/10
You have a very nice orchestra, but sometimes the scores feel a bit random, probably the lack of transitions between bars has something to do.
Although hihats have good transients they're very loud compared with the rest of drums, I think cause you used too much compression, so you should consider turn down the hihats a pair of dBs and do the opposite with the kick and snare.

Silvercat: 6/10
Nice atmosphere, but sounds too industrial to be dubstep, i guess?

NolTrollRoll: 8.5/10
Although there's not much growls, the scores are so damn catchy with all that variety of synths, and it has a pretty good use of phaser effects that makes the bars very interesting.

G2961: 9.5/10
Yeah, no wonder coming from the frontpage guy. Excellent mix and sound design, powerful drop. Nothing more to say, just totally nailed the vibe of a classic DubstepGutter release.

Amazing work with the mixing at the middle section, you nailed the groovy fell of a classic house track.
The ONLY THING ruining the drops is the obviously loud bass that it's drowning the body of the kick entirely and saturating all the mix. It seems that you made the bass wider by splitting it an octave higher to the right, I'm not a genius of mixing but I think that would work better with something such as chord stack.

Pretty average.
It's a nice techno tune but aside from the bell synth it lacks some lead synth to layer with the chord progression. The arpeggio that goes after the first minute sounds cool but wish it sounded louder. As opposite with the hihat, seems a bit louder than the rest of drums. So my point is it needs a bit more balance and another score to fill those empty bars around 1:10-2:00

About the cracking noise, I can't help much cause I haven't experienced any cracking sound when exporting a song ever, try by boosting the buffer lenght on your audio driver, but it could be cause by another factors such as your FL Studio's audio settings or your export settings if you only hear it once it has been exported. Check those and look up some forums or tutorials.