Alright, I'll try again.
The Book 2 rules are BROKEN. Until we fix them computer literate gamers will continue to discount Traveller as serious SF. That may only be 5% of gamers, but it is easily 25% of our demographic.
They make sense as game rules in the abstract, and show a good understanding of where data processing was in 1970. The microchip revolution knocked that all in the head, making the jump from TL6 to 7 several orders of magnitude. And TL7 to 8 at least two more. So if a 1 ton TL6 computer can run 1 program a 1 ton TL7 computer can run a at least a hundred (for the same cost) and TL8 ten thousand at least. Which if a 1 space program is judged to be a real-space navigation program is entirely reasonable.
Beyond that we are getting close to speed-of-light limitations on computing power, so future improvement in computing power, whatever the technology used, will require that the gates be closer together and thus the whole computer smaller.
The extra programing power means you can get away with programing bloat. Which means you can add extra, unnecessary capabilities to the program. One example would by the "year 2K" disasters that didn't happen. Most TL6 programs used only two digits to identify years (55, 68, 74, etc) to save space in the data registers, and were unable to tell the difference between 00 (1900) and 00 (2000). In real world there were few problems because TL7 progrms were mostly written to store four digit numbers, because they ran on computers with more speed and memory. The older programs were easily rewritten because they now ran on more powerful machines.
And I haven't touched on how object oriented languages, modular design, and database use have changed programing. And computer intrusion has divided into hackers and script kiddies, white hats and black hats,
To make an analogy, it would be as if Traveller guns never made the jump to metallic cartridges at TL4. So TL5 small arms were 10 shot cap 'n ball revolvers and machine guns were heavy Gatlings loading paper cartridges with seperate caps. And higher TL used better propellants and lighter metals, but never quite got the hang of an all-in-one cartridge. Meanwhile, players who are gun nuts or military veterans wonder where their auto pistols and assault rifles are.
In brief,
At TL7+ computers, up to the limits of the technology, become trivial compared to the 20+ ton bridge slice. At higher TL the more powerful computers will not be bigger.
Programs at TL8 + are so sophisticated they are written by teams of programmers over months. And sufficiently generalized (to amortize over a large market) that they can work for a number of people in different places with only a change in a datafile. At higher TL computers will program themselves with limited human guidance.
Keeping the computer percentage and making it sensor enhancement keeps Book5 combat and the canon designs. The other proposals either do not address the underlying concerns or are band-aids. The GT and T4 fixes risk being out of date in a very few years, if they aren't already.
I admit I think a complete rewrite of the rules, trivialising computers and applying weight and cost penalties for military and scout sensors would be preferable, but that would break the cannon designs and still break Book2and Mayday combat.