We think it doesn't make sense that a grunt in a ditch somewhere can spot an enemy and instantly provide his entire team the enemy's position, movement and type (infantry, sniper, vehicle, tank, etc).
Also if you have played PR for some time, you may have noticed that the easiest way to get an enemy location is not to use your eyes, but Q spam an area and hope that the system "catches" that location.
First, infantry can't auto-spot. You still have the "spotted" option in the Q comm rose but that can only be used to shout a message to close-by troops that you have seen enemy forces. Pay attention to where your team mates are looking when spotting and you can help them out.
Second, vehicles can auto-spot, but only other vehicles. Auto-spotting vehicles isn't much of an exploit like it is with infantry. They are bigger and louder, easier to spot. We think reporting single infantry positions is not realistic, and having a red circle moving in the map, showing exactly where he is, is not realistic either. You can still Q spot the area with some "question marks" that wont move around, but will give your team mates an approximate location of the enemy.
Third, squad leaders receive a special mix of the spotting system. In addition to the points above, they can right-click the Q comm rose or right-click on the map and select an option from a list to mark that location. Like in v0.6, only important spottings are transmitted over the radio. Internally, we say that the squad leader is carrying a radio on his back and is responsible for reporting enemy activies higher in the chain of command. We know that in real life it's another squad member's role, but having a squad limited to six players and the voip system as it is, we think it's a good compromise.
We think this is a great improvement to the mod as it removes the problems mentioned in the beginning and forces players to rely on squad communication and their own eyes to be successful, instead of a blinking red circle moving around the minimap.
Other updates in gameplay will also improve these changes, but that is a topic for another post



RANGERS LEAD THE WAY!!!
Do not post stupid suggestions just because you had a bad round in PR 
Jaymz