I just posted this in the other "The Pacific" thread but I think it applies here as well:
With Band of Brothers the first two episodes were training, the last one was sitting around waiting to get shipped to the pacific, and there was a stretch near the end where they spent two episodes dug in frozen trenches staring at an invisible enemy who never brought on a full attack. The series followed small squad attacks on a line of troops doing shooting practice, into a small village before falling back, and taking a prisoner during the night across a river amongst others. You had very little sense of the advancement across the European front, just the experience of the soldiers. Seems the same is going on in The Pacific but for some reason that isn't good enough. The fighting was much more chaotic due to the nature of the landscape and the enemy. The quality of the action in episode 5 alone was better than anything from Band of Brothers. Yeah, it has been almost ten years so they should be able to create a more realistic and immersive battle sequence, and thankfully they do.
As far as character development, I feel The Pacific does a superior job of building real characters. Band of Brothers was a collection of many characatures but not real people. Winters was well developed but that was about it. There were too many characters shown in too short of a time to really get into the meat of who they were, including having someone be the primary focus of an episode to just never seeing them again. Since many of the guys were still alive who were portrayed in Band of Brothers, I can't help but feel they took away as much of the rough edges as they could with those guys. Any "war is an atrocity" things were done by people outside of those guys. In The Pacific, they are really jumping into the characters and showing that they weren't perfect and the situation out there was far from perfect as well.
I think you contradict yourself a bit. I find the Pacific disappointing not because there isn't enough fighting or explosions, but because the series thus far feels lifeless and the characters nameless individuals. You claim people are upset cause they want more action, yet as you correctly point out there were significant stretches of BoB where there was no fighting - or if there was, it was short and sporadic. Why then aren't we all disappointed with BoB? Because it was also an excellent character drama, which the Pacific is not (at least so far).
Maybe it is the actors, maybe it is the fact that HBO had an excellent book off of which to base BoB, maybe it is something else....but the upshot is that I still can't really get behind any of the characters in the Pacific, whereas in BoB you had memorable ones like Spiers, Malarcky, "Gonorrhea," Winters, "Bull," etc etc. I think I speak for most of the people who have posted negatively in this thread when I say we are not Michael Bay fans clamoring for explosions...we just want to see a compelling WWII drama, and so far the Pacific comes up short, especially when measured against BoB.