Different people like different things

I used the ADS for thousands of hours, over 30,000 systems & it worked for me. The ADS does things the new process does not, and having used the new system in beta & since launch I can confirm that there is no downside to having the pre-3.3 discovery process remain. They should not have been removed & doing so creates an issue which will only get worse the longer their absence continues.
The ADS & other modules should not have been removed & need to be put back into the game. Those players that prefer to go without an ADS (or BDS/IDS) gain a valuable module slot, and save some power & mass. This easily offsets the minor advantage the ADS has in specific, rare circumstances.