I don't think you have any major issues there. The tracks and vox and the mix mostly sound fairly good.

I think the karaoke thing comes from the style you might have selected. I noticed this especially on HOTRS. The STYLE you choose really, really matters. Kind of a lounge lizard version of the song. Of course that's just my humble opinion. A typical Holiday Inn lounge band version.

It can also come from not selecting a style that is in the middle of the parameters specified for the tracks and style. You will notice that the tracks (real tracks) indicate a minimum and a maximum tempo. Going as close to the recommended tempo as indicated, rather than towards either end or outside of the parameters will give you a better sounding track.

Quite often, I have to search for a different track. For example the sax in HOTRS is not happy at that tempo. I would either find a better one that plays well at that tempo or eliminate the sax and use a different fill/solo instrument in the song.

When I work on a cover tune (which I rarely do) I try to be as faithful to the original as possible and yet, still incorporate my personal touch into the song. Doing covers is tricky. It's easy to be cheesy.... but it takes some effort to really make a better version of the cover than everyone is used to hearing.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.