Holy night-and-day-difference! Wise decision to cut the guitar for bass, it SLAPS I'd edit your original post to have it be the most current version. It'd be really annoying for someone to take the time and give feedback for you if they don't notice the update 😄 

Dude.... this is sick aF For real, love the ideas going on here. You seem to get stuck harmonically after a while, but I know it's common for this type of music continue to build layers over a set progression or whatever. Branch out with your chord progression, you wouldn't even have to change a lot of the textures going on.  Do you know much music theory? That will for sure help, as you'll learn what you're doing more clearly which will in turn lead you to possible ways of extending your piece. Otherwise, learning and perfecting an instrument helps too BTW, stay away from samples if you can, you'll learn much more and get much better building your music from scratch.  Remember to poke around on the forums and check out other's music too, you'll find people are very open about sharing honestly what they like and dislike, and you'll get more views and clicks bruh. Welcome 🙂 

As the poster above me asked: How well do you know your theory and the craft of composition? If it is simply that you're feeling stumped, or struggling to get it to sound how you want, then this is usually the source. I would also recommend you get a MIDI controller to input notes into Musescore that way if you don't already. It would be painfully slow trying to input it with mouse and keyboard. Your piano trio may go faster if you use a DAW and kontakt libraries instead of musescore. Then, you can just record your piece in real time, and with pianos, you don't have to worry about keyswitches and other MIDI annoyances. Honestly, it really isn't. Especially if your goal is concert/neo-classical stuff. It is better to put out 5 pieces per year that are amazing, then to release 10 middling ones just because you feel you have to hit a certain number. Even from the most iconic composers, only a handful of their pieces are really well known to the masses. In many cases, the composer spent anywhere from weeks to years writing them.  Even bands, who typically are doing way simpler music than classical; each new album is a result of 1-2 years (or more) of songwriting and selecting the best ones for the album. Back in the days of record deals, labels would demand an album of X number of songs within a short time-frame, which is partly why "Girls, Girls Girls" is the only decent song on that album. Also, remember that Carl Douglas's only song of note was 'Kung Fu Fighting' 50 years ago and he wound up with a net worth of 5 million. In other words, if no one is breathing down your neck to get this done and paying you to do so, take all the time you need. Lastly, since you say you're in school it's safe to assume you're pretty young: Know that the field of professional orchestral and neo-classical music is not a pursuit for low-time preference individuals; it is mainly an old man's game. I lucked out when I was 18, and got my first professional job, but that is an extreme rarity. Most guys don't see any success (financially or otherwise) until they have DECADES of experience under their belts. So aside from the aforementioned advice, I'd say: Take your time, and just keep chipping away at your pieces. Even 1 bar a day is progress. Because as the saying goes:  

I think the idea is interesting overall! The instrumentation is cool and I like some of the rhythmic ideas! My main concern would be the musical "goal" of the idea. For me it seems to loop without any development. As a type of background music to say a video game, I think this type of piece would be a perfect for it! But if it were meant for a more "performance" type of music, then, I would look into how to develop ideas further! As it is, it does not sound bad! I would like to ask, who are your influences and what type of music are you looking to write! Keep going! Also, my ear did not bleed lol