Until I stumbled upon Comfortable/Cosy/Compact, I wanted to ask them to reduce the spacing ASAP.
However, Compact does it and I used to other icons in the new Calendar interface.
All in all, it is not bad. I am glad they added "gadgets" because I never used chat and hated to see it, now I got rid of chat, invitations etc.
Only Two Things Are Infinite, The Universe and Human Stupidity, and I'm Not Sure About The Former.