Abilities will evolve and headless ones will fall.

Guardian Abilities

Happy with super cooldowns in PVP, though looking into outliers on high and low end
While better, continuing to look into global changes for ability timers and neutral abilities in order to hit the 60/40% gunplay to ability goal (Not happening in S19, probably post Lightfall)
Goal of S19 is to balance out Light 3.0 and Stasis sub classes to be as even as possible

Restoration 1 down from 25/50 health per second in PVP/PVE, to 20/40
Restoration 2 down from 40/65, to 32.5/65
Restoration no longer stacks with Healing Rifts (the highest heal per second wins out)
Radiant from Ember of Torches now last 8 seconds and the fragment applies -10 Discipline
Ember of Solace applies 50% bonus to Radiant, instead of a flat 5 seconds (which it already does for Restoration)
Knock Em Down on Deadshot Golden Gun now provides 15% damage resist, but removed the bonus duration
Knock Em Down on Marksman no longer provides the 15% DR
Knock Em Down on Blade Barrage now provides 3 bonus projectiles per group instead of 5, dropping total knife count to 20 knives
Celestial Fire close range damage increased from 90 to 100

Void overshield now gives 50% DR in PVE, instead of the bugged 25%
Vortex Nova Bomb now has 21% increase in projectile speed, 17% increase in pull radius, and 20% increase in pull strength
Improved Shield Bash's reliability in applying suppression
Deadfall Tether lifetime increased to 12 seconds on trigger
Moebius Quiver lifetime lowered to 6 seconds

Touch of Thunder's roaming duration of storm grenade lowered to 4 seconds
Decreased the bonus duration of Spark of Magnitude from 2s to 1.5s for enhanced storm grenades
Visual ring around Storm Grenade remains constant making it easier to tell if it's a friend or foe
Ballistic Slam PVE damage increased by 16%
Tempest Strike PVE damage increased by 30%
Arc Soul PVE damage increased from 35 to 60
Ball Lightning travel range increased to 35 meters
Chain Lightning PVE damage increased by 50%
Chaos Reach base cooldown lowered from 9:16 to 7:35

Stasis slow movement penalty increased by 10%
Coldsnap seekers now have up to 0.5 seconds to change directory and lock onto target before moving
Duskfield Grenade slow application rate increased to 13% in PVP
Winter's Shroud fragment slot count increased from 1 to 2
Cryoclasm fragment slot count increased from 1 to 2
Reduced Glacial Harvest creation cooldown per 6 shards created from 15 seconds to 10 seconds
Whisper of Rending bonus damage now works for all primary weapons types, not just kinetic

A lot of PS5 players play the PS4 version of the game, upgrade that for free yo!!!!
For last gen, Bungie is adding modified textures to reduce memory footprint