I believe its time for Terran to revolutionize how they play. They are best suited as a blockading force, to starve the enemy, and force the enemy to trade inefficiently against pre-spread units with ravens for anti armor and disable support.
Terran isn’t quick like zerg on creep to rush back home, or like protoss for immediate recall. Zerg and Protoss can call in reinforcements quickly. Larvae and Warpgate/Prisms can punch in reinforcements instantaneously.
This means terran’s priority isn’t to strike a position, but to hold a position. Strikes should be secondary. And in this way, terran can split and make a medium sized force push back or fend off a large force if you spread units and hold position correctly.
Also, it doesn’t hurt to have marines patrol (about 4-6) on the battlefield mid line, side lines, corners, and mid-sides throughout early and mid game.
The longer the game goes, the more terran loses their edge. However, terran can blockade the enemy preventing them from expanding and forcing them to break through them. So its a reverse turtle. I’m a terran player, my portrait is supposed to be a banshee, idk why its protoss at the moment LOL.
Ravens save scans. Literally 1 200 gas unit can save the lives of many units, they make the composition that much more effective (as long as you dont A-move/move command into the enemy).
Always send 1-2 marines out and wait 5 seconds before sending out main force. When the vanguard spots the enemy, siege half to most tanks, and spread bio and hold position in front of tanks. Bait with a few units, and scouts on flanks of main force, macro home and build another army size force.
Terran isn’t supposed to mass into one army and attack. Terran is supposed to have cost effective mid-size armies that can reposition and hold position. Think of it like dual wielding, or having a shield, sword, and dagger as a back up.
Other than the SCV terran units can shoot from afar off. Balling up into an attack will damage your units and shorten their life span and lessening their overall damage before death. Then they try to micro back fire, micro back fire, which is not effective. Spread out your bio then hold position, lure, and splash damage with tanks vs debuffed armored enemies due to raven, or anti-dps/disabler due to raven. Stim your bio after the enemy engages you, and or only stim the vanguard units to bring the enemy back into you into range. Their a move will ripple throughout your spread units, caught by splash and die. You a few times sometimes lose your force, but at the cost of the enemy losing most of theirs.
Terran controls the enemy, because you know what your opponent has to do, you are then always in command of the game.
As terran, never, ever attack with your entire army. Ever. Because if they die, home dies.
Holding positions forces the enemy to punch out units that can break it, that means YOU, the terran, controls the enemy’s decision making. Because if they try to by pass your blockade, your blockade turns into an assault, but you already have another force at home.