Is there any way to add/remove options from this list ?
I don't think that you can. I don't recall being able to create a 'DefaultRegion.sfz' or 'DefaultEffects.sfz' for Rapture, like there is for DimPro and RXP. Maybe you can.
What you can do is globally select ranges of the available routings over MIDI.
[shift+right-click; MIDI Learn; shift+right-click Set Min; shift+right-click; Set Max].
The options seem sort of arbitrary, and instead of reverse engineering them to determine their usefulness I'd prefer to just enter an order I'm interested in.
I thought that at first when Rapture came out. Once I figured out how the series -> parallel || and parenthetical groupings worked, the 14 combinations became a whole lot more useful. Steeper filters, distortions that don't step on one another, the under-rated Width control for narrowing the soundfield before panning; ... this might give you a couple of ideas:
Wide Load - Stereo Wavetables in Rapture 1.1/LE