While i would like to see things like this.
All in all this 'is' just a video game imo.
And you have to think of the forcepowers/lightsabers involved when it comes down to EJ's and Normal stuff.
Friendly fire with lightsabers happen all the time, including EJ's sprinting ass with forcepowers into crowds. If everyone got lowered the lightsabers would 1-3 shot.
As for what would need to change if this 'does' get implemented.
-Modifying all wepaons to do a less, standardized damaged
-Modifying all perma weapon stats which may result in another weapon wipe to modify and change everything
-Specific vehicles do a fuckton of damage at the moment, ie the freighter already 3-4 shots a max stat SOBDE member if i recall correctly.
-Including what you mentioned, modifying classes to make them different with stat boosts or agility bonuses.
People would still not only B-HOP in combat and rush, it would prove more useful then it is now as first shots in PvP would be extremely matterful. People would still abuse in-game mechanics more when people aren't looking if it becomes failrp.
Just to name a few
The only good thing i can see coming from this is the galactic marines with their 100 Armor drops becoming super viable in almost any situation.
And force heal for jedi's becoming SUPER Op.
However My view on this would be that just lower things, rather than remove it out right, modify it in a way where combat would feel successful and rewarding, intense and fun rather than people running in, tanking shots and running back out/repeat. removing them entirely does not sound like a fun experience, whilst the specific classes get buffs as well.
An example i would think of that could be acceptable: 501st Jet trooper would get 150-250 HP at most with max stats, less armor than normal troops, why? Jet troopers not only were meant to be light and versatile, they would have the advantage of learning to use their jetpack and maneuvering in combat to help with it, but also with the fear of taking fall damage.
Combat scenario: A jet trooper would scout upon and check the enemy forces before returning down to the floor to move in with the main unit, they engage in a firefight and use their jetpack mid-combat to hop up onto high ground to distract or pull the enemies attention whilst they are still fighting, while with the risk of being killed due to their lightened armor.
What would not be acceptable with this change is 600 HP 300 armor individuals(No shade i promise <3) Flying around with huge damage westars acting like literal pests and flys ticking down your HP as an EJ or in pvp because they have the HUGE fucking buffs. This kind of promotes the whole Rambo/run and heal. Type of scenario, especially with bacta bombs.
I feel the time needed and work needed to be put into this would be fucking massive and i don't believe this would even come in 2020 if this were to get accepted.