There are many new features and changes that will be introduced in Clash of Clans in the upcoming updates. The developer team has worked on improving various aspects of the gameplay. These improvements will be released in various countries in different stages that will span over a period of multiple days. Here are some details of the changes that we can expect in the upcoming update.

Introducing Quality of Life Improvements

Heroes will now have an Extra Life: The dev team has added a new feature through which Heroes will have Extra Life. When a Hero returns from battle to the Home Village after taking damage, the Extra Life health is used towards healing these battle-worn champions. For example:
If a Hero has 50% Health left at the end of an attack and the Extra Life bar is at 100%, then that Hero is fully healed and the Extra Life bar is reduced to 50%.
If a Hero is reduced to 0% Health and the Extra Life bar is 100% full, then the Hero will be fully healed and the Extra Life bar is reduced to 0%.
If a Hero is reduced to 0% and the Extra Life bar is 50% full, then the Hero is healed 50% and the Extra Life bar is reduced to 0%.

Here is some additional information about the Hero Extra Life feature:
Heroes first heal their health. Once their health is 100%, then the Extra Life bar will begin to regenerate.
The rate of Extra Life regeneration from 0% to 100% is the same amount of time it takes a Hero to fully heal.
This only affects the recovery of Heroes after attacks and does not affect a Hero’s maximum health during an attack.
The Extra Life is shown as a heart icon next to the Hero’s HP indicator. When the Extra Life is fully regenerated to 100% it will display a heart icon with a “+1”.

https://twitter.com/ClashofClans/status/1493617264263897090?s=20&t=F_bTd4b6cd5V1sxmoL0CbQ

Changes made in the Clan UI: An icon denoting a player’s Town Hall level will be displayed by each member in the Clan’s profile. This icon will replace the player’s XP level shown in the Clan profile. Leaders and Co-Leaders can see approximately how recently Clan Members have logged on to the game. Anything longer than 7 days will be displayed as “over a week ago”. There will be various sorting options provided while viewing a Clan’s profile. The options will be:
Most Trophies
Highest Town Hall level
Role
Last active date (Only Leader and Co-Leaders of that Clan van view this)
Most Troops donated  (Only Clan members can view this)
Most Troops received (Only Clan members can view this)
Highest XP level

Balance Changes, AI Changes, Clan Games Changes, Gold Pass Changes, and Bug Fixes: If you want to know about the detailed description regarding each of these changes you can check out the official announcement page by clicking here.