You have a more technical eye, doing what you do, so i'll take your word for it but I'm just going from what I see on the screen.
As for the aliasing it is there on my TV, It's not a majour problem yeah but I'm just saying Devs should eliminate that before all else. You can have a great looking buolding but if the railings around it are shimmering mad it makes it look lesser. The Pro has no supersmapling option when you are connected to a 4k TV unfortunately so perhaps you are getting a better experience playing at 1440p in this area using that feature.
It's not just a matter of devs getting rid of it. More often than not, they use a multi-sampling feature that is often taxing on the engine. Thus, they cut corners (using 2x multi vs 4 or 8). The result is a relatively clean image with better performance. No matter how much hardware power there is, the engines still demand what they demand. Unless you game on a decent PC, console games will still run into this issue from time-to-time, but considering how much worse the 360/PS3 era was, they have made ridiculous improvements (and higher resolutions will continue to be the best anecdote).
That said, I know everyone's experience is different and the slightest blemish on an otherwise perfect image can be frustrating (why I ultimately got into both PC gaming and 3D art), so I do empathize with you.