Aside from Contagion -- one of my favorite episodes -- when they were combating an unbeknownst-at-the-time computer virus -- when else did the crew wonder about design problems with the ship? I never got the impression anybody felt like they were flying around in a lemon; rather the reverse, actually... Much of the time I felt they were all too often awed at the the magnificence of the new ship (particularly the holodecks).
I seem to recall a ship from history that was considered magnficent a technologcal marvel of it's of age, had people in awe of it. Unfortunantly it sunk in 1912.
Nothing wrong with being awed by something just have to have some secptisim that not everything may be as great as it seems.
But perhps later builds of the Galaxy Class ship had features built into through lessons learned from the earlier ships of the class.