etotheipi,
I agree with everything you've said. There is nothing you have to defend.
I like your dictionary definition, I fall into #5, excessive or impressive in quality, quantity, extent, or degree.
Traditional IGUG and activations do not portray the action to the degree it is because combat, for the most part, is a time-competitive endeavor. Commanders rarely select the sequence their units will move, fire, etc. They also fail to portray gun realistic rates of fire and do a poor job of simulating opportunity fire.
The quality of the crew matters because with all things being equal the better crew will be faster going through their OODA Decision Loop seizing the initiative and there are various trade-offs and risk-reward tactics to do that.
Traditional IGYG and unit activation games do create interesting tactical problems for the player to solve and sometimes do a fair job of recreating real action.
In general, none is any better than any other, it's just down to what you want to represent and specifically how you do it.
I guess that's why there are so many different systems.
Wolfhag