As far as internet sleuthing in order to solve this case, imo it's no better than a guessing game because we don't have a lot of facts to go by. Saying that however, the wide range of speculation that has overtaken this case is rather fascinating. If nothing else, the family deserves for Libby and Abby not be forgotten so that justice will eventually be served.
You are totally right. We simply do not have enough information to do much more beyond speculation.
- We don't know if BG has a limp
- We don't know that the girls were taken away and then brought back
- We don't know how they died
- We don't know what was used to get them "down the hill"
- We don't know if their shoes were on or not
- We don't know what, if any, weapons were used on them (weapons as opposed to hands)
- We don't know if there were more than one perp
- We don't know the names of the other POIs (although we know there ARE more)
- We don't know what else was on that videotape, if anything
- We don't know what was in BG's pocket (if there was anything at all)
- We don't know what that white thing is around his neck
- Who discovered their bodies
- We don't know the girls' times of deaths (days but not time)
- We don't know what witness/es provided the info for the sketch
- And, of course, the phone issue is a big debate
These are all things that people have speculated on, and deduced theories based on additional information that's slowly been released, but none of us absolutely know the answers to any of them. However, over the course of almost a year, the theories to some of these have been tossed around so much that they're starting to come across as "facts."
When you think about what we actually KNOW about their murders, it's strikingly little information. This isn't a crime that, I feel, will be solved by strangers like us (many who live hundreds, if not thousands, of miles away) but I agree that it IS important to keep talking about it because that keeps the case alive and fresh. That's the important thing right now.