I just installed the Wolfram Desktop 12.1 clean install on windows by first completely uninstalling all previous versions so previous settings don't impact the new installation.
The new front end for version 12.1 is all over the place. Its font sizes are completely ridiculous. At first, I thought bigger fonts can be managed but they are impacting all around.
Suggestion and command templates have smaller font sizes than the rest of the system. Also I can't even see all the columns of the dataset by scrolling all the way to the right (probably because of the extra rounding box around the dataset and huge font sizes).
Another issue found, weird controller placement in Manipulate (By default the
ControlPlacement is set to
Automatic, so the font changes are probably causing the
Automatic algorithm to choose
Left as the appropriate default):
Another issue found,
WordCloud again based on the Automatic algorithm is causing overlaps since it is not tuned to consider the font changes in 12.1. (By the way, I have