I've gone through periods of my life where i preferred systems where armor partially reduces the damage done as a separate step from to hit. At least these days i now see that as a preference.
So far, i think the one omission that perhaps is a bit more than a preference is the lack of a vehicle combat system. But even that maybe is just a preference thing, maybe Traveller is just saying "tank combat isn't where the action is." Clearly folks saw this as one of the big missing pieces, I have a variety of magazine articles describing a vehicle combat system for use with Traveller. It is worth noting that Books 1-3 do NOT describe anything other than small arms for ground combat. Now there might be a bigger argument that Book 4 SHOULD have included a vehicle combat system since it introduced such a variety of weapons.
It's also worth pointing out that any game is going to be incomplete. It's impossible to present rules for every aspect of real life, and I submit that the close to that a system gets, the more unplayable it becomes just from the sheer amount of rules to manage.
Frank
True, and yet in TTB pages 111-113, the G-Carrier and ATVs are told to be armed, and the AFV. Al laredescribed there, but no rules as how to use them in combat are given.