Proximity to what, the magician or the victim? I do think proximity matters, but I would also think that mana being manipulated could be sensed both where the magician is casting the spell, and where the spell manifests itself. Unsure if any space in between would be affected.I'd also rule that cover would affect sensing magic. For example, if one is perceiving in the astral, there's the astral world to take into account, the auras of all living things, whatever background count, etc. exists, and then the magic. I'm unsure if I want to apply a formula to it so much as just wing it with what makes sense. Distance especially seems problematic, as an area with very little astral presence probably wouldn't be difficult to sense through for spells.
Also, while I'm sympathetic to your concern, the CRB does explicitly state that magic is rarely subtle. For Control Thoughts things get a little swimmy. According to the CRB victims get a chance to both resist the spell and notice the spell, but it also states that while Control Actions is very obvious Control Thoughts can be "insidious." I'm a little torn on how to run that. One possibility is to only give the Complex Action to resist the spell to targets of Control Thoughts, but both tests to victims of Control Actions, until the spell has been fully resisted and then immediately give the victim a Perception test to see if they notice that they were being magically controlled. Another option, and this seems to be the best way to run Control Thoughts to begin with, is to cast it at a low Force and use Reagent to bump up the Limit. But, that reduces the penalty that the victim faces for their resistance roll. I'm open to suggestions here.
One last point about Control Thoughts is that it seems like a spell best cast in private away from prying eyes.
Also, what were your actions for CT2 IP1?
CT2 IP1
Flickr 18
Q2 14
Q1 10
Crowd 9
Q3 9
CT2 IP2
Flickr 8
Q2 4
Action to Flickr
ETA: @Tec, can I get an Auditory Perception test? Let's call this at a -4 modifier.
ETA2: The interior of the club is now experiencing a Noise rating of 7. @Mal and @Zwei, let me know how your drones are doing, and if you've lost connection to them.
ETA3: Thanks for the good posts everyone. Really glad about the energy we've got going on here. @Tec, the rules oddity for Detect Magic is strange, counter intuitive, and seems contradictory to the section on Perceiving Magic. Not sure I like that. Do you have any ideas?