Absolutely. I know for a fact that many remixers including my main man Beatdrop use nothing but FL. Just import what you play into FL, if you want a more human feel.
Might want to check this out, though, as I'm hardly a remixer.
Yeah, you can do a lot with your equipment. I'm remixing right now with some horribly outdated, simple notation software, no keyboard either. All is does is record down notes. But, at least I can print out the music afterwards and do a live, solo-piano recording.