This may apply to more then AND / OR conditions bt i would love a different color background for each of the conditions you create. So that when scrolling down with the new UI its still clear in which on you are working. Right now the tiny gray lines make that hard to see for me.
Specially when u scroll down and do not see what the block is anymore.
It can be very subtle and and just switch between 2 shades of gray for example:
