I just got tickets to see Dream Theater in Copenhagen in Febuary. I also bought a Meet&Greet pass. What happened at the Meet&Greet(s) you were at? What was the program? How much time did you get with the members?
You get to be around them for around 10 minutes (i.e. watch them come in and sit at the table signing). Once the line starts moving for the actual signing, it moves pretty quick and you have about 15 seconds with each member. The tour people will try and speed things along, but the band members aren't rude about it at all. It is a really cool experience, and usually they will have you sit in a tented "VIP" area before hand with everyone else that has the M&G package, so try and meet some new people (cause everyone there is guaranteed to be a die-hard!).
It sounds short, but it is totally worth it, as the picture lasts a lifetime, and you get some neat merchandise too (guitar picks, t-shirt, VIP laminate). Don't fret about the price for value since its already paid for, and just have a great time