It could definitely be a good idea to test an amp without using the room correction, DSP or other trickery... aswell. Why not? But, I am equally interested in hearing/reading about the amp with those features. When it comes down to it it's simply the end result of what you've got available that's important. And if room correction, EQ, DSP or other trickery works as a benefit due to your room (and taste) together with the amps already existing capabilites and qualities I see no reason for debate.
I myself couldn't manage without Audyssey's Dynamic EQ. Honestly, everything I've tried without it sounds pretty bland to my ears (this is mostly for movies though, music can be a different matter). Apart from my own tests at home I've heard quite a few set-ups now in well treated demo rooms with amps that don't feature Audyssey Dynamic EQ and they've absolutely been ok (Yamaha, Harman Kardon, Pioneer, Rotel, Primare). But as soon as they switch to an amp that has it - *BOOM* - everything falls into place. I experience exactly the same in my home.
I think this is because Dynamic EQ is more than just any old equalizer - it's an automatic loudness feature that very effectively balance the sound from every speaker without sounding artificial or bloated (IMO). It brings out the smallest of detail and engrosses you with a myriad of sound without letting any one speaker "take over". All that at normal listening levels that I, thus far, find hard to replace with anything else. I mean, for example, when I tested the Pioneer SC-LX83 and 85 they came off as terribly front-heavy and a little 'flat' duing movie watching. The surrounds were very subdued. I put the Denon and Dynamic EQ back in place and the difference truly was huge, but not in a distracting way. I think if one likes Dynamic EQ and gets use to it (in the positive sense) it can be difficult switching to something that doesn't have it. In my experience anyway.