Having seen the new rule book, it in essence comes down to two major changes. In brief.
1. No net calls (lets) on serve. If the ball hits the net and then lands in the correct playing area then it is good and needs to be played. There will be no re-serves. This brings our game into line with other court sports.
2. The ball may be dropped (without any motion other than releasing the ball) from the hand or paddle. It must bounce either side of the back line and can be hit with any stroke deemed suitable. No need with the server to worry the position of the paddle, wrist above the paddle etc.
Did some tests today and even when the player dropped the ball from the highest he could reach, the ball still only bounced just above the players knees. It appears that there may be some slight advantage for advanced players. E.g. it will be possible to apply some spin.
The rule changes come into effect on 15th January 2021
This link is for the complete set of rules. Enjoy reading this and not getting confused: https://drive.google.com/file/d/1ZRsxYVyexBrlpLAknkWsgWJVAlDBa4v3/view?fbclid=IwAR1ztUjnuI5lhRyAWdIZyrNpvX0Frzemz-XNGOJvUYvas4P4fknWgeve1zw
This YouTube link gives a good explanation: https://www.youtube.com/watch?v=-Ol-dIil7HE&t=218s
Have fun out on the courts playing singles.