I only gave it a quick test prior to installing the waterblock, plus i had monitor issues(needed a displayport to active DVI-DL adaptor), still looking at replacing the monitor, getting the Electriq 35" Ultrawide(it's the Massdrop Vast sold under a different name)Then it sounds like you have a physical hardware issue. How did the card run without before you disassembled it?
Hotspot temps are just over 100, but thats with a heavy OC, at normal speeds it's going at about 80MSI Afterburner, RivaTuner, or similar, do not like Navi. You should close/disable them and use the AMD overlay.
When you say temps are high, how high are you talking about? The temp reported will be higher naturally since it is hotspot temperature, but you may be throttling depending on the heat and cooling.
Wattman constantly crashed on me whenever i try to make changes, it's the most flaky part of this whole setup, but i think it might be conflicting with the plethora of RGB management software i have installed
Haven't really had a chance to put this thing through it's paces, just more initial impressions and my daily grind on BnS. If i had known BnS performance was going to be so shit, i would have gone for a 2070S.