Yes, of course - hence centuries of many different projections of the earth, that more often than not warp continents well out of proportion, depending on each map's use case (such as producing the nice and orderly parallel meridians, for navigation, with the vertical cylinder of the Mercator projection -- it's a little more complicated to get by with just ruler and protractor on one of Buckminster Fuller's "Dymaxion" unwrapped icosahedrons).You do know that any sphere projected on a plane leads to heavy distortions in some way or another?
I have also, myself, on occasion experienced the joy of trying to unwrap a complex triangle-mesh 3D shape with a lot of concave bits, into a contiguous, tiling, UV map, with as little distortion and size variation per tri as possible (...with an honorable shoutout to the inherent consequences of quads fundamentally being two tris put together).
Yes, they did great. I usually tend to wrap the word "just" with quotation marks, exactly in order to take the diminishing edge off the word, when using it to say something relative in nature; Naturally, the second I forget to do this, I duly get drawn and quartered for it. :9It's a little unfair to call them "just" discs, etc, because the solution they came up with at the time is kind of brilliant.
So, we now have an acknowledgement of the problem, a decision, and the reasoning behind said decision -- that is good at least! I just hope that by not dealing with the matter, Fdev do not paint themselves into a corner for the future; Presumably, while the topology of existing planets is now "frozen"; Repetition and "bland-ness" on coming planet types can be made less... "egregious", using the same procgen engine unaltered, though growth of the library of predefined shapes, and tweaks to new procgen rules.