The most effective CAS is when the pilots have trained with the supported unit, know their supported commanders well, and have good training in target recognition as well as orienting their approach to be parallel to the friendly front lines where possible.
All of the wonderful technologies are excellent - but no substitute for knowing your "customer" and their needs in the close fight.
Precise coordination is now available via data-link. CAS remains something driven by the GROUND commander.
Nothing beats hits on target, too - which is easier when you are not at 100’ trying to avoid hitting the ground AND still hitting the target.
I’m an A-10 fan, but they’ve made mistakes too.