I wouldn't say there is "no dynamic range" there's a little, especially with stuff the arp and the string pad in the main section, but yes its pretty flat. I don't really go for much expressiveness when I use chiptune synths, I like quite a harsh sounds but I can see what you mean, the EQing and relative mixing is fairly limited on this track and I think I'll have another go at the mix at a later date, maybe even submit it afterwards...
As for the the low end on the snare thats just a habit I've picked up from starting out on DnB I guess haha, I still feel like I'm treading new waters with Hip Hop, one of the main things I struggle with is where to put the bass, there needs to be something around 200-300hz but it feels like it does better with a big subby presence below 150hz.
Thanks for the advice and the kind words