Yes, please. I think the ongoing Battle Pass: Season XVII, "Guided Fury" - War Thunder Wiki challenge “Warrior of the Three Elements” only highlights the need for this change to be implemented into Bluewater.
I think it is a good idea overall, but more for Naval mode.
For Tank battles I suggest these ideas:
1/ Create a new category of assist in game “Allied tank Rescuer!” Giving more XP.
For example, when one of your allies gets severyly damaged and you come and destroy the enemy tank that damaged your ally, you get this reward.
2/ Allow the share of XP when your rescuer helped to repair your severyly damaged tank.
Also I don’t think it should take 1.2X the normal time to repair severe damage. The game is already good as it is.
3/Show to all the allies the Severely Damaged tanks on the mini map with a special icon. Or show the damaged tanks that need assist with a special icon on the map.This way a friend can come to the rescue. Maybe allow this feature inly in Arcade Battles, not in Realistic battles and Simulator battles.
I hope that one of my idea will be implemented.