Modelers have the impossible task of toeing the line between ideal and unreal. I've only recently realized what a good job some of the current batch of modelers do, not at just making great tones, but in mimicking reality. Meaning if you run the power amp at 10, if you don't post EQ for your speakers or compensate for the idiosyncrasies of that particular speaker or microphone in the model, you will indeed get an unpleasing tone. Compounding this is the fact that modelers often let you do things you couldn't do in real life or that would be cost / time prohibitive and you have the recipe for everything from tonal nirvana to "this thing sounds like crap". Is it the modelers fault? Mostly, I think it's not. More and more I'm beginning to understand there is A LOT that goes into a good guitar tone. You have the guitar, everything you might want to feed into the amp, the amp, the speaker(s), the mic, the mic preamp, post-EQ, post effects, etc. Boosting, attenuating, cutting - it can make you go mad. I thought I knew a lot about tone, but the more I learn from others that really know how to dial in a patch from end to end, the more fun and rewarding this stuff gets. And you know what, they are often applying experience from the real world to the digital realm and guess what? It works! So if you played or heard a modeler with some deep editing capabilities and you have dismissed it. The problem might not be the modeler, but maybe missed an opportunity to learn something. Judging a tone is easy, but understanding how and where to improve it is where the art lies.