Personally I don't think passive scaning should be nerfed into the ground entirely, but it should be redone.

1) All Light and Medium Suits should be capable of avoiding all but prescision modules.
This is a simple one, medium suits should sacrifice 1 dampener to get under the majority of passive scans, dependent on the amount of prescision mods equipped.

2) Passive Scans should be changed to a sonar format.
Currently Passive Scans give the same data as Active, you can see exactly where they are, what direction they are facing and you can see them moving. I instead propose that passive scans provide 'blips' which don't come with directional indicators and only update once every 1,2,4 seconds for light medium and heavy suits respectively

3) Active Scanning should also be redone.
Active Scanning currently is equally broken, you ping once and you've got 10-15 seconds worth of data. This allows a logi to effectively multi-task, scan, rep, rez, repeat. The player can 10 seconds worth of potentially game changing intel for about 2 seconds worth of time where he can't fight back.

Instead I think active Scanning should require the Scanner to be constantly equipped, turning it into a kind of magic torch. You will only receive intel on the section the torch is shone on, but as soon as the enemy leaves the 'light' you loose their data.
This stops scannerina's since doing such a trick only results in you getting a wlrse version of passive scans.

It also puts the player at greater risk for his reward and stops the whole Scan, Rep, Rez, Repeat cycle. Scanning gets another layer of tactics.

When do you scan?
When dl you stop scanning?
Is better to track a single 'fast-moving' target or maintain intel on the main pack?