It only affects the long range splash Smokaz.
Yeah. That's the problem. The AoE that was effected by the T4 also is the AoE ring that gets the shitty long range 0.3 damage modifier. So it doesnt really matter that the AoE ring is bigger, it does shit damage. The accuracy for all ranges is still 1, then subject to the target tables, so it's not the accuracy, its the damage.
In my test version, I made the AoE identical to the normal Tiger. I'll play around with that for a bit and and see how that looks.
Since you only get 1 KT and it's the center piece of this T4, it stands that this buff should be worth while.