The reason everyone is complaining about the second half drives is because they didn't pick convert third downs. After the FG drive to go up 34-17 in the third the drives went like this...

1st and 10 at GB 28
(12:27 - 4th) E.Lacy right tackle to GB 32 for 4 yards (A.Zettel; Z.Gooden)
2nd and 6 at GB 32
(11:47 - 4th) (No Huddle) E.Lacy left tackle to GB 46 for 14 yards (Z.Gooden, G.Quin)
1st and 10 at GB 46
(11:01 - 4th) E.Lacy right end to GB 48 for 2 yards (K.Hyder)
2nd and 8 at GB 48
(10:17 - 4th) A.Rodgers sacked ob at GB 48 for 0 yards (H.Ngata)
3rd and 8 at GB 48
(9:39 - 4th) (Shotgun) A.Rodgers pass incomplete short middle to R.Cobb (Q.Diggs) [K.Van Noy]

1st and 10 at GB 26
(6:35 - 4th) A.Rodgers pass incomplete short left to T.Davis
2nd and 10 at GB 26
(6:31 - 4th) J.Starks up the middle to GB 25 for -1 yards (K.Van Noy; G.Quin)
3rd and 11 at GB 25
(5:49 - 4th) (Shotgun) A.Rodgers pass short left to J.Starks pushed ob at GB 34 for 9 yards (R.Bush)

I don't really see that as overly conservative. On the first drive you are maybe quibbling about 1 play...the Lacy 1st and 10 run for 2 yards. Given that he had gained 18 yards on the previous 2 carries it's hard to disagree with that. On the ensuing drive, Rodgers threw to Davis on first down for what should have been a first...instead he dropped it.