-I'll be honest, I don't understand the staccatos here at all. They're on practically every single note and I'm not sure that they actually mean ... anything. I don't think they will really affect how the performer plays this piece at all and I think that if there is some intended effect by them, it would be better for it to be conveyed by a direction rather than articulation.
The staccatos are there to convey the pointy sound of those synths in the original. I believe they do make a difference, even with pedal, because it changes the attack of the notes compared to a legato or 'normal' attack. They're also there to there as a direct contrast to the tenuto notes (the flowy synth strings). I could notate something like "all notes played staccato except where noted", but that may create doubt on how to play the slurred notes (which are there for direction in the music, btw, not for legato).
If you want an example of how this is used in original (classical) sheet music, it's here in Debussy's Reverie (1:46):
-In the last two systems, I think that we could make things clearer. A lot of the places where you have voice leading lines they're unnecessary due to the slurring. The first two slurs there make it entirely clear where the voicing is going and as such the lines become cluttering. Bar 20 is easily the most confusing, and I think it'd be better with the what's currently in the lower staff to be a lower layer in the top staff and leave the bottom one empty. That would entirely remove the need for either of the voice leading lines and would make the hand placement less confusing I think.
If you find that confusing, you should've seen the previous version, lol
I agree on the voice leading lines in m. 17-18, I deleted those. I felt like m. 20 was alright as it is, but I moved the the second part of the L.H. in bar 19 up to the R.H., so that voice changes hands earlier, which should make the voice change from L.H. to R.H. in m. 20-21 clearer. I also added a line in m. 21, to better clarify which direction the line in m. 20 is going. I think the lines, in combination with the articulations, should make the voice leadings pretty clear now.
(i fixed the tenuto defying slur btw)