Marvel's Wolverine Reduces Scent Trail And Audio Sense Opacity
Hotfix v.01.001.005 tones down the indicators and addresses some crashes. Insomniac is still considering toggleable Senses options.
Scent Trails and Audio Sense indicators are less opaque in Marvel's Wolverine after hotfix v.01.001.005. Insomniac's September 19 patch notes describe a presentation adjustment intended to make those visuals less intense.
The update also addresses common crashes that the studio says affected a small percentage of players since launch. It does not identify the crash triggers, so the notice gives no way to match those fixes to every reported crash.

Toggleable Senses options are still being explored
Insomniac says it is considering toggleable options as part of further work on Senses. The notice provides no delivery date and does not announce an off switch in this hotfix.
Update and reassess the indicators if their intensity bothered you. If you specifically want to disable them, wait for confirmation of that option before treating it as a reason to return.