I started a conversation in the shout box, that the KT seems like more of a comeback mechanic for aggressively placed tier 4 trucks. In most games you never build all 4(3) trucks. Then you start getting rekt and lose your tier 4 and you are basically out of the game for a long time (fuel cost/time to build). The KT was a requirement to keep a presence on the field. In order to be a one click comeback it needed to be somewhat OP. However it was too OP last patch so people just built the KT right away. It is probably in a better spot this patch, however you die a little every time you see one made since it instills no fear. More joy from the enemy because they get to kill it and vet up
This is also why the Luchs was so important to be stronk. Letting you skip the Medic HQ. Since it has the lowest fuel cost late game to build. Go Luchs, then Panthers until you lose your T4. Then make the medic truck and call in the KT. Mid to late game you have decent infantry and good armor. Late game switch to great infantry with healing and slow dominant armor.
TL/DR
OKW is probably in a good spot now. Just like other armies, their intended play style is just changed a little. KT could use a small buff if tier 4 is ever going to be used as designed.
I think that's a core design problem. If you have noticed they've nerfed something and then had to buff it several times now.
Basically what I imagine the balance process being:
Oh hey let's nerf this, ok but then this needs to be buffed, ok so let's buff this, oh wait but then this needs to be buffed or nerfed as well...
And it's just an endless buff and nerf cycle because the Armies were so retardedly designed.
Example? Sturmpioneers and Volks, Volks were considered too OP so Sturms were given the Panzershreck, but now Sturms seem too weak to be using the Shreck, and now people want Volks to either get the Shreck upgrade back or for the OKW to get proper AT infantry, since if you give a Shreck package to the Obers you'd need them to be in a lower tier, meaning that their AI would need to be nerfed and stuff like that.
Case in point, the Western Front Armies were badly designed, with the sole exception of the Brits who just lack tank traps and a mobile mortar in my opinion, that's about it. And yes a snare but people have been dealing with no snare just fine, if you want a snare just go Special Weapons.