If you want a real good across the board nerf to survivability, remove the shield redistrubution from Tac Team.
Cruisers and slow turning ships totally obsolete? Give a Damage Reduction modifier, much like the shield modifier, to ships based on turn rate. The slower, the higher.
all removing TT would do currently is make spike damage 10 times more dangerous. it would do basically nothing to prop up pressure, manual distribution can keep up with pressure. as long as there is DHC spike, there NEEDS to be TT.