On the Group Awareness thing... yeah, it might be a pain to remember to track individually. But, as it's been mentioned, R&C talks about (makes it sound like it was still in the discussion stage at the time of the R&C's writing) making some skills, like Perception, passive "defense" values. Essentially, the DM notes the "take 10" score for the PC's, and this is what he rolls against for active uses of opposing skills, like Sneak. (One advantage of this mentioned is you don't alert the players that something's up asking them to make a roll.)
In that scenario the onus is on the DM to remember the Group Awareness bonus and adjudicate the proximity of the characters to each other. I think one thing that could really, really help facilitate this is a "DM Sheet"... a sheet which allows the DM to record all the important stats of the PCs, with places to note things like group bonus. So just by looking at the section with the Perception skills of the PCs, there's a reminder to take the elf into account. The new character sheet has been hyped much for it's attention to organization and detail (like something designed by the Container Store, per Shelly Mazzanoble's column). Let's hope similar thought has been given to tools for the DM.