Never heard the original Bi, but this key sounds like where it wanted to sit all along.
Some comments. The mix as a whole is pretty sub heavy on the kick -- can probably afford to bring it down about .2 to .3 dB and have the rest of the track stand out more from behind it. Sounds like you could also benefit from cutting some reverb and cleaning out the sub 250 hz on any sends, just to keep from sounding bogged down. But this isn't a huge issue.
There are some percussion slapbacks on your final drop that occasionally come to the fore in a very noticeable way, and not necessarily as something the casual listener would intuitively understand as a transition.
Overall the song is good, but I end up feeling something is missing, something like the vocalist you may have mentioned. There's not really a ton of moving lead material to carry us through sections. But overall, good work. The piece is cohesive and flows without having to be forced.
Thanks for coming out to NGUAC!