T5 looks to be a raging success, for one persons bank account.
So don't buy it. Problem solved.
Me, I've gotten enough enjoyment out of Traveller over the past 34 years (errata and all) that I'm willing to buy it and take a look, even if I don't end up using much from it, even if as you say the main effect is to boost Marc Miller's bank account. I've gotten enough previous enjoyment from his work that it is worthwhile to me to take the chance. YMMV, obviously.