Yea I hear you. But this unit (and others like it) should be able to do what I'm looking for.
I normally use a Digitech 1101 rack unit. It has some amp tones in it, and a bunch of effects. I plug into the head directly, and the Digitech goes through the effects unit. It's nice and simple and sounds great.
I was trying to lighten the load of carrying a 6 space case around, so I thought the HD500x would do everything and more that the Digitech does. So far, it's been complicated, I'm spending more time trying to get all the details figured out than I am playing.
So here's the deal... My guitar into a Wah, into the front of the amp. All other effects to go through the loop of the head. I should be able to set the volume on each channel to my liking, so I could solo boost, and It should sound the same as using pedals. I could combine effects together and store them into a single patch so you don't have to hit them individually. That's what I do now with the 1101.
When I tried the 4CM, I had to turn the gain down on the head because somewhere, something was making the signal hotter than if I was going to the front of the head directly. It kind of colored the sound in a way. It was close, but not like going straight in. I was thinking it's the FX loop block I placed to the right of the Mixer in the HD500x signal chain.
So I think going guitar straight to the head gives the best sound. All I need to do is to get the effects to work.