I've played each game probably more than 10 times, and I can't see myself returning to QfB for any reason. We have pirates in ToD, the weapons and environments were all (but a few) formed using assets from ToD (therefore making the game slightly less special to me)
The only thing you can do in QfB is collect mods and bolts. And your are pretty much guaranteed to buy everything first time without any money issues. In most other games you get skins, gold bolts, skill points, challenge mode, arenas, bolts, cheats, and in only a few games ship mods, raritanum, gold weapons, platinum bolt mods and so on…
And the fact it was without a doubt the easiest R&C game sort of puts me off it.
As for the 1 new mechanic being the wrench (same as ACiT) is was kind of okay, but really all of the puzzles were extremely easy to figure out, although I will admit they were far better than ACiT's puzzles. But they pale in comparison to others like the Refractor and Clank puzzles.