I've heard that reservoirs are easier for bleeding and getting air bubbles out of your loop. I think Jayztwocents latest build youtube (or one of the latest) he was planning on a distro plate but opted out for a more traditional reservoir because of some complications. I wasn't really listening and missed the issue he had.
I think distro plates have their niche for a: looks and b: on occasion, cutting down on complexity of your loop (especially with hard lines).
Asus Prime Z370, Intel 8700k @5.0Ghz, Nvidia GTX 1080 Ti, 16GB @3400 CL14, Watercooling: x2 MCP355 pumps, x1 280 on front of case, x1 360 on top of case, x1 140 on back of case, x1 240 on bottom of case