What if ship construction rules allowed for greater miniaturization at higher TLs?
Set a baseline TL (say, 12) and that's book cost. Then apply different rules for reducing tonnage requirements for large systems like computers, jump drives, M-drives, and so on. Perhaps 5% reduction per TL. Compound, not cumulative, so if something was at 100 dT at TL 12, it would be 100 x .95 = 95 dT at TL 13, 100 x .95 x .95 = 90.25 dT at TL 14, 100 x .95^3 = 87.74 dT at TL 15, etc.
Hull and armor remain the same.
Allow reduction of minimum jump size from 200 down, at higher TLs.
Repair of high-TL components require a space port of that TL, but reduced by a technician's engineering skill (a component requiring TL 14 to fix can be fixed at a TL 13 facility by a +1 Engineer).
TL becomes a measure of miniaturization as well as new functionality. This makes all the "in between" TLs at higher levels do something useful.
Set a baseline TL (say, 12) and that's book cost. Then apply different rules for reducing tonnage requirements for large systems like computers, jump drives, M-drives, and so on. Perhaps 5% reduction per TL. Compound, not cumulative, so if something was at 100 dT at TL 12, it would be 100 x .95 = 95 dT at TL 13, 100 x .95 x .95 = 90.25 dT at TL 14, 100 x .95^3 = 87.74 dT at TL 15, etc.
Hull and armor remain the same.
Allow reduction of minimum jump size from 200 down, at higher TLs.
Repair of high-TL components require a space port of that TL, but reduced by a technician's engineering skill (a component requiring TL 14 to fix can be fixed at a TL 13 facility by a +1 Engineer).
TL becomes a measure of miniaturization as well as new functionality. This makes all the "in between" TLs at higher levels do something useful.