I doubt it. For one, 32-bit ARM is pretty complex too (though 64-bit ARM is a very nice simplification). More importantly, though, you can overcome the x86 complexity by simply throwing enormous manpower at the problem, and that is what Intel has done over the years.
(That doesn't mean the complexity is justified, just that it can be overcome. I think that people often assume that x86's dominance means that there's something inherently amazing about x86 from a microarchitectural point of view. That isn't true; rather it's simply that x86/Windows has historically earned Intel so much revenue that they've been able to fund the manpower needed to keep it alive and on top.)
(That doesn't mean the complexity is justified, just that it can be overcome. I think that people often assume that x86's dominance means that there's something inherently amazing about x86 from a microarchitectural point of view. That isn't true; rather it's simply that x86/Windows has historically earned Intel so much revenue that they've been able to fund the manpower needed to keep it alive and on top.)