No so bad in terms of evolution, many changes worked, few didn't:
Their Dual Analog sticks is now the foundation of any controller.
Adding handles on the sides became standard and evolved over the years.
Dual rumble is now mandatory, sony even got scolded for not having it at launch with ds3.
First controller with 1:1 tracking, this is now the foundation of any VR controller.
First gyro in a controller, rarely used except racing games, more for VR.
Led color for controller identification was a simple addition but worked well.
Integrated speaker is a gimmick but some games have fun with this. (nintendo's first)
The standard headset jack is absolutely mandatory now.
Direct share button was simple but a success.
Touchpad remains sadly just one big button so far.
Wireless is now ubiquitous, so is bluetooth.
Pressure sensitive buttons didn't work and was dropped.
Camera had a few successes, now it's for tracking VR and video chat.
Still up in the air for DS5:
Dynamic resistance on the triggers.
Touchpad api adds on-screen functionality, maybe devs will use it more.
VCMs for the rumble, should be a very wide frequency range.
Integrated microphone array for voice chat, mute button.
Share button changing to create, whatever it means.
Slightly larger, some might like it, some might not.
Looking at game controller history, without innovations we'd still be playing on a single button Atari 2600 controller. The dualshock influence have been an important one with much more successes than failures...
https://www.theverge.com/2019/12/2/...lers-modern-shape-design-ps5-25th-anniversary