The 1:20-1:50 part has some weird rhythm choices, unexpected triplets or some mix of triplets and dotted notes, or something. Pardon my small theory vocabulary.
But man this is a fun idea for a remix. Nice work on it, too. 2:50 sounds especially Russian.
Hi! It's still loud. It's still bright (not a big deal anymore, though), and there's still background-sounding things in the foreground.
The glissando at 0:07 sounds great. It's appropriately background-y. Compare that to 1:24 when I don't know what's lead and what's background. If you sort that out, it'll sound better overall. Cleaner. It's okay to move instruments from foreground to background and back depending on the role they have, but then it's good to have an eq or reverb mix to automate that you can use to push the instrument in either direction. 1:03 sounds good in this regard, you move the previous lead back to make space for the new lead melody. 1:10 is a mess in that same regard.
The foreground-background separation is the main thing I'd complain about for this track. Eq and reverb are important tools for pushing things forward or backi nthe mix, but the most important is the track level. Loud things get attention. And your leads get a lot of attention when less would be enough, 2:18 has a really loud and clear lead. It's clear enough, it doesn't need to be this loud.
I know it's tricky to figure this balance out. But here's some things to listen for. It does sound clean, so probably cleaner than before; good job on that. I'd still want the track levels sorted out. Background things softer. Foreground stuff that doesn't need to be _as_ loud also softer. Depending on where in the track it is and what it needs.
I'm noticing a lot of things that have become second nature to me are difficult for less experienced mixers to grasp. It's easy for me to say "make the loud things less loud when it's right to do so", but then I'm assuming you can tell. And that takes practice, listening, experience. Refresh your ears and come back to this, see what needs to change, change it, refresh your ears again. I can't offer any better advice than that. You're on the right track, now comes the ear grind.
Hey GSO, I see you've posted a lot of remixes now. I listened to a few of them and noticed a few recurring problems. You might want to pick one of the remixes and do your best to solve the problems in that. Quality over quantity, you know? Anyway, here's what I found:
1. The sound is mechanical. There are a lot of piano mixes on the site (and lots of piano music elsewhere). They tend to sound like pieces of sequenced midi files or separate performances stitched together. While that's a perfectly acceptable form of remixing, it takes some work to make them sound good together. A big part of a human performance is the dynamics, within each phrase, from phrase to phrase, and in the arrangement overall. Another is the subtle use of timing, being slightly in front of or behind the expected timing. I heard a few humanization techniques in some of the other tracks I listened to, but they weren't used well. Humanization is difficult. What I do is to start with a (bad) human performance and correct it, rather than start with sequenced notes and try to humanize. This might help you too.
2. The arrangements lack transitions. The stitched-together criticism applies here too, but on a different scale. 3:03 is a great example of this, then another one shortly thereafter at 4:07. No lead-up to this change, no break, no signalling that the arrangement is going into another part. It's jarringly different. Signalling a change can be done in a lot of ways. And sudden changes aren't always bad.
3. The mixing is loud and harsh. For a few of these remixes, I've noticed a strangely muffled sounds, but this one is loud to the point of clipping, which doesn't sound good. Listen to 4:44-4:47. Can you hear the sound crackling and breaking? Look up some youtube mixing tutorials and guides on audio dynamics and clipping so you can tell when it gets too loud. You've been at this for long enough that you have all the knowledge you need, you just gotta apply it right. A video on what to look out for might help. Mixing with a reference track might help too, something to compare your music to in order to hear if yours is too loud, too muffled, or has any other such problems.
I hope this helps.