I think the knowledge that a new 'modular' Mac Pro is coming gives a different context to this machine. I think people are framing this on the idea that: if you want a quiet, good looking machine with a great screen and the other 'benefits' of an all in one (and don't mind the trade offs), then it's good to have this option. If the trade offs don't work for you, then wait for the more traditional Mac Pro.
If it had been released without any mention of another option coming for pro users, then it would have been framed as "if you need workstation grade hardware running mac os, then your only choice is now an expensive, non-upgradeable all-in-one which has traded off performance for quietness and for other thermal constraints".