Shaft, you should use it a bit more often
I don't know, I learned it well when I got it (takes some time I admit) and now I know where the stuff is. It needs all those knobs and buttons, the UI is good. Less knobs or less screen would not make it better. IMO the matrix makes sense - you assign everything at the destination. In modular, I too prefer to have my attenuators at the destinations rather than at the modulation sources for example... So I'm used to that thinking.
For any real time (mod wheel, aftertouch, etc.) / VCA "modulate the modulator" modulations, use the CROUTES. My shortcut to go there is hit PITCH (wheel) ASSIGN or MOD (wheel) ASSIGN twice. In there, again select the destinations first and the sources second (GRID page for quick enabling / disabling, as well as amounts of modulations).
FM: OSC2 > OSC1 is easy, there's a knob. For everything else, in the OSC menu go to MZEXT. Everthing is there as intuitively as it can be.
Filter FM: OSC > VCF is separate from NOISE (resp. external) > VCF. For both you don't have an individual amount for the two VCFs, you can only switch them on or off for each VCF (that is, one, the other or both for each VCF independently). The setting is obvious in the respective filter page. In the OSC pages, you can choose for each one whether it should FM the VCF or not. OSC > VCF amount is set in the page of filter 1. NOISE > VCF disables the noise in the audio channel and the amount is then set by the knob in the pre VCF mixer.
All that said, the amounts of modulations and gain stages you can get are indeed absurd. To get some control, use the increase / decrease buttons. And: if you hit these two both at the same time the selected parameter goes to a init position (usually 0).
When you know that shit (I typed that by heart), you can go from one beautiful sound to another one in a matter of seconds. The awesome ribbon only helps.
Maybe people are just getting lazy that they don't learn, or old that they don't remember their synths anymore