I might do that, but Cliff updates the firmware so quickly (currently in version 9) and they're are enough people whining about it on the Fractal forums that I'm sure we'll get something dense and synthy in one of the next updates. As I said before though, there are a ton of workarounds, half of which I like more than some of my original sounds and some of which are just really flexible and tweakable. I'll do a doomy fuzz sound clip for you with static low-pass filters, distorted synths, a tracking ring mod, some more distortion, and an octave down. Mix together and feed to a Mesa model with the high-pass shelving cranked down to 20 or 30 hz. It's huge.
The Axe is frighteningly good at amp modeling. Pretty much all of my guitar player friends have had self-analytic "I can't believe it's not butter" moments when I run it in full 32-bit resolution through a headphone amp or even a power amp. The delay and modulation can be very convincing but they can also get into more extreme territory, especially with the routing flexibility you get.
For bassists, the current weak link is the pedal-distortion area. But the thing is, the models themselves are excellent. I don't have a Muff by me to compare the Axe's model to, but I've owned plenty of Muffs before and it's frighteningly accurate. I think I can honestly say that if I had one extreme fuzz model, I could tweak it differently a billion times and get everything I needed out of it. I think Cliff is aware that he's really taken care of the metal fans, classic rock fans, fusion fans, blues fans, prog rock fans, etc. but has kind of neglected some important American bands that aimed to challenge our concepts of "heavy" and definitely "noise." I'm not saying that you can't get great sounds if you're into that kind of music, but at the moment, you're not going to find them right out of the box.
I sold all of my pedals, preamps, and rack units. I'm just using the Nord Modular G2 Engine and Axe-Fx Ultra now. I don't regret it at all, am programming more unique stuff than I've ever had before, and am definitely complaining about "sterile" digital effects and models at all. I think I really underestimated how inspiring convenience is. None of my cables are ever broken and I can sketch out some ideas in the editor while I drink my coffee, dump them to my hardware later, tweak them a bit from my laptop, and then save them to be recalled with one stomp.