Thanks for your perspective. Yes, I won't do any tinkering myself. What I might do (I did this once before with another guitar) is upgrade the saddle to bone or FWI and ask the tech, when installing it, to leave a fraction more saddle showing than there is now. The only issue with that is that the guitar sounds really good as it is, and a "better" saddle may not result in better tone. Another possibility would simply be to use another guitar for altered tunings. As I say, in standard tuning I only get that 'snap' if I really dig in with my thumb, and it may be better to take advantage of the ease of playing this guitar affords at the 5th fret and beyond.