Well, I do really like the original song and mix found on the great Cambridge-MT library, so I was very curious to listen to a remix on this (and not another mix).
I really like the overall mood, tempo change, song/arrangement choices and I found it works really well to me.
The final solo is another great idea to me!
I do enjoy those 4 minutes of music and it has it own fingerprint which isn’t easy while remixing song.
Congrats for all this great stuff, and for both of you!
Mixing-wise, I only find the low-mid frequency area a bit burried and maybe a little cut on these would help
Remixing-wise, I might play with some ping-pong delays on vocal to add some point of interests, like some strong cuts and glitches to create some more obvious transitions.
By the way, it is a very pleasant piece of music to me. Now, I am very curious to listened to another work from your duo (expectation? maybe)