If you are trying to make backing tracks using ONLY real tracks, then I'd agree that it would be hard to incorporate the signature licks...

But In my experience, RB has several features that make it particularly GOOD at capturing the signature hooks:

1) it has an excellent way to extract chords and tempo map the original song so you can use it as a guide while you add other tracks to the mix

2) after you create your RB version, you can blend the original tune in and out of the mix wherever the vocals drop out... (and the signature licks almost ALWAYS fill in the spaces where the vocals drop out. ) so you end up with a song that is 25% original recording and 75% RB, blended together in perfect unison.

Whereas you MIGHT get away with that if you were using the backing track in your own low-profile gigs, you certainly wouldn't be able to rip the original recording and sell it as your own backing track.

Using this technique I have made some backing tracks for my own use that sound just like the original, but without the vocals. If making realistic backing tracks is your main goal, RB is amazingly good at it... better than ANY other software I've ever used for the same purpose. And you can do it VERY QUICKLY too... depending on the speed of your computer, in less than 30 minutes you can import an MP3, run it througth ACW to tempo map it and extract chords, add real tracks for each rhythm instrument, then crossfade the tracks at appropriate spots to get rid of the vocals, and presto... a cover song with all the original instrumentation.

The trick is to make SURE you have the chords and tempo map right BEFORE you start adding real tracks. And you need to be judicious about picking which real tracks to use... but depending how you crossfade, the real tracks will be behind your vocals so the differences won't stand out.. and when you stop singing the original song comes to the forefront.. so, it becomes quite seamless.

Try it. It is very easy! (but better not try to sell them because I don't think that would work out as well for you as it does for the lawyers...)

https://www.dropbox.com/sh/ey71h8ep047758h/AAC12jNM0Hz9Q8zsh5iDeqNHa?dl=0