@@C. Thunder Dash
Honestly, i was going for a transcription. I just call it a arrangement just because it sounded more unique. xD But unfortunately, you are correct. The harmony of My Past is not Today is just very repetitive. Normally when I listen to the songs and write the notes, I go more for accuracy because I'm afraid if I deviate from the song too much, it'll sound way too different (which is a problem with many transcribers). My Past is Not Today is just one of those songs that gets so much more praise than it deserves. But I did it anyway just because I ran out of stuff to do. Which is why when I start to transcribe songs and listen to them, I suddenly realize some of them are just too repetitive for a piano.
Songs like Find a Pet, Bats, or even This Day Aria have instrumentals I really love. For example, in Find a Pet and Bats, the contrast of the mood between Fluttershy and Rainbow Dash or Fluttershy and Applejack is something I really love. This Day Aria is one of the more complicated songs of MLP and it blends together well. But it's been done so many times. Rainbow Rocks songs are generally a bit more repetitive or maybe perhaps bland (well, with the exception of stuff like Under Our Spell or Welcome to the Show (The Dazzlings Part)).
Now if I was composing my own music, it would be a completely different story. I could do whatever I wanted. But I would most definitely not be repetitive with my notes. But unfortunately, studying to be a bio-medical engineer and maybe doing premed does take up time. I'm still a serious clarinet player and I play in my college's concert band. I also play the piano for fun.
Anyway, I just wrote this to tell you I am completely aware that sometimes what I do can sound too "bland". This is why some synthesia videos on Youtube are a bit boring due to the lack of variety in the notes. Every musician puts out a few stinkers there and there. I still consider Twilight's Theme and my True True Friend Winter Wrap Up (Ultimate Mash Up) to be some of my best works so far (and my more popular ones!). At least I know my adjustments to the piano (less reverb) paid off. While the tone of your criticism seems to be more like an attack than an objective evaluation in the beginning, it is far better than saying "This sucks" and nothing else. Thank you.
P.S. I should just start calling them transcriptions rather than arrangements until I actually make an arrangement. .
P,S.S. I'm planning on doing Darude-Sandstorm next, which probably is the most repetitive song ever. xD