Not that it's any of my business at all but the very fact that you would even consider not renewing your subscription because they would write something you don't like doesn't really show much willingness to hear the other side but I will try to anyway :)
I think you are ignoring a couple of things.
First New York has skyscrapers everywhere still prices are sky-rocketing. So claiming that would solve Londons probems isn't really founded.
Second as the article mentions. The value that someone accrue by owning land is 99% of the times based on the surrounding 99% of society increasing that value. If anything it's much fairer to tax the value of land because compared to income tax you aren't actually doing anything for that value.
In New York right now. Chinese or buying apartments cash. Go to Miami and you will see plenty of amazingly expensive apartment complex be ghost towns because it's owners live in Brazil and just have it as a backup.
The people who actually develop new areas with a few exceptions are artist and young people who make an area hip enough that developers want to a house here and there and slowly but surely push out those who made the area worth investing in to begin with. Who benefits. Some of the people who lived in the neighbourhood for a long time but had nothing to do with the increase in value of a place.
Infrastructure choice isn't irreversible it just takes time. London wasn't bombed to anywhere close to the degree of a place like Berlin so of course it wasn't really going to change the width of the street.
More taxes on land is solving the fact that urbanization is pushing people to move into the bigger cities. Again reasons unrelated to the fact that someone own land.
There are plenty of ways to discuss taxation on land that would be both more effective and fair. There is nothing useful about people using property as an investment tool it just drive prices way up.
We should reward money that work and tax money that doesn't.