seaborn scatterplot datetime xaxis too wide

I posted the question as an issue on Github, and got this great response. Basically, the problem is that plt.scatter does not deal with dates well, and seaborn uses it. If seaborn will add a type check for the x-axis, which uses plt.plot_date for date values instead, this will be fixed. In the meanwhile, one can create a custom version of sns.scatterplot that does excatly that.