I will try to make a few observations on the orchestration technique used by Ale....given also the nature of the workshop and the section in which we are writing.
I would like to just defend Faria; I don't know what he intended, but the problem with the flute is that it cannot play ff a D above middle C, so in the descending triplet runs (as it was, measure 68?), there will probably have to be a diminuendo, but not down to f...in my opinion, not beyond mp. Given the fact that horns and trumpets are also playing, I would have handled the passage differently. This way, it risks not being effective.
From a quick glance, I'll add something else in the hope that it is at least minimally useful ...
First page: oboe piano and trumpet mf, I am not sure if this is the desired effect; furthermore, the oboe in that register is very "ugly" and should be at least brightened up, for example with the flute an octave above, which would also help you balance the 1st trumpet. In fact, on page 2, fl and ob work better.
When the flute plays in a register like from the second half of 32 to 34, I would double it in octaves...it's true that you start with the oboe, but then at 34, in my opinion, you should go into octaves with the 2 flutes. Furthermore, in this instance, the oboe plays towards the low and loud end; as we were saying, it doesn't give its best...it should be brightened up; I don't think you would like it live.
At measure 39, you ask the horn for a p in a register where it is difficult; it can be done, but it starts to require an excellent instrumentalist....
Graphic note at 56: if you write "small" in the instrumentation, it's a pity to then indicate piccolo; it's better to write "takes small"...by the way, in the instrumentation, it is better to explicitly indicate the number of instruments.
These seem like details, but to understand the orchestration I had to scroll through several pages of the score to see if some instruments were playing as 2, etc....at one point I thought you had used multiphonics.
Given the warm atmosphere you sought to pursue, I would have orchestrated the strings in a completely different way, not just coloring lines but working on doublings and division of sections to obtain situations of warmth and cold (and variations).
These are just some macro things that caught my ear from a quick glance; clearly they apply to a traditional type of orchestration...obviously, if the goal was the demo you presented, there is nothing to object to. It works well enough.
In fact, it's the reason why I think that excellent samplings can allow for orchestrations different from traditional ones, as execution technique and structural limits of the instrument are excluded....in short, if the sample is good, a pianist can play as if they had 35 fingers, the flute manages to play ff middle C, etc.
Anyway, for me it is a very personal work that can be pleasing; there are many forms of transcription and not just philological ones... so welcome if you wanted to show the "tacky" side of Chopin... after all, he wrote the notes himself.