Tell me,
why does a 152mm Howitzer with either HE or AP ammo not penetrate a Tiger II?
Because balance. Back when it was anti everything, it was too strong. Though I do feel like it could do with some deflect damage, as its frustrating having bounces with such low reload and ammo swap.
And why is it possible to dual shot a regular shell and the ability shell at the same time?
I thought this was fixed, I've not been able to do it in ages so
And why does the howitzer not deal consistent damage against non moving targets?
HE with attach ground is your friend vs infantry and support weapons. Its very strong when used this way.
And get penetrated by raketens while the 88mm Pak 43 does not penetrate its front?
Raketan is an AT gun, if it never penetrated a tank* then something would be wrong. Also I dont think its possible for the PAK43 to not penetrate the front of an ISU (though I'm unsure how to calculate far pen).
*I know its an assault gun.