50 points in tactical gives you a lot more than 50% damage. It moves you nearly 1/3 of the way through the weapon module progression (assuming that there IS 1/3 of the way left to travel before you start counting).
And the caps you are talking about, you'll never reach them if you dump all your points in command.
...Or at least that's how it's supposed to work if you use the proper requirement mechanics. Which the game doesn't actually enforce...
Half the point of getting rid of that exploit is making module requirements an important part of the balance.