It is definitely ideal to have a studio headphone for quality check. I may be used to my speakers but my room's acoustic isn't 100% great. So I make sure that my track sounds just as great on my headphones!!

Yes one can definitely achieve a full sounding mix with just a few elements within a track.. First of all there is nothing wrong with listening to pop music. And it is definitely great to analyze it's mixdown and the song's instrumentation. It's how I got better!!  Anyway one basic way to make something sound full is using chords. I don't mean just holding 3 keys. Just for the sake of demonstrating if you can play every single note from every octave you SHOULD have a full sound. If my track focuses on a lead synth but LACKS fullness when I just hold 1 note, then I'll either create a chord that consists of holding 5-7 notes at the same time then proceed to making a progression out of it... OR focus on sound designing on a lead synth that sounds FULL when I hold 1 note.

Naturally, our ears tells us that something sounds full WHEN a source is producing frequencies that covers the whole Frequency Spectrum.

woww

love the overall vibe....  can't wait for you to finish this

Definitely wanted to keep the 80s vibe. Hope you guys like it.

Sounds good!! But yea like most said at some point the vocal disappears. Also before the drop happens you can either have a quarter note of just
"silence" or a short fade in fx. Anything to make the transition sound more smoother. As for the brick wall thing, I personally don't think its a terrible thing. It doesn't sound too squashed. In the end just double check every sound and make sure that whatever you think should be heard, will be heard.

good luck!!