That first picture looks amazing. The Kop is starting to look even smaller and more outdated. Hopefully something can be done with it in the future. But for now, it's going to look amazing. Definitely the right decision to stay at Anfield.
I think its been done to death on this forum, but short of maybe the Kop expanding capacity through safe-standing, I don´t think it is ever going get expanded further back.
I think the main way to have it retain its unique status going forward would for it to become the grounds only all-standing side. I would say that is maybe increasingly likely going forwards, depending on steepness restrictions, as all the signs point towards safe-standing being introduced to top-flight English football sooner or later.
Looking at the Anny Road as well, if they could sort out of the facilities to enable it, I would say that Lower Tier is also a prime location for the possibility of standing spaces.
Obviously the Kops reputation always stemmed from those on it. But they´re getting older year on year. And in terms of being architecturally imposing, this Anny Road second tier makes it look tiny.