I'd say it's already very impressive that they managed to reproduce how things looked. Now, I've never been to Warsaw, but judging from other cities I've seen

I'd say it's already very impressive that they managed to reproduce how things looked. Now, I've never been to Warsaw, but judging from other cities I've seen that have been destroyed in a similar way, many cities -- and especially city centers -- never even managed to evoke the original looks. From their modern day form, you can only guess how the city used to look like, given enough fantasy (if at all possible). So while it is a huge tragedy, at least what you see are reproduction, not 50's/60's concrete blocks that were built out of necessity to supply somewhat affordable commercial and residental space.