To be honest, this is a point I very much differentiate from a lot of people on.
Personally, I think APHE is fine how it is, at least in principle. The main issue I have at the moment is there is no advantage that solid AP really has over it- not really in pen, nor in damage. Imo the rounds should differ as such-
Solid AP/APC/APBC/APCBC:
Generally slightly better pen then APHE, and more damage inside their spall cone.
APHE/APHEC/APHCBC/APHECBC:
Overall slightly less pen then solid AP, but having its current ‘sphere of death’, as many call it. Damage is slightly less then solid AP, but with, again, the sphere of death.
APDS:
What it currently is, but buffed damage inside its spall cone, but not to the level of solid AP. Reduced chances to shatter, though.
APCR:
Roughly the same post-pen as APDS, but worse angle pen and overall pen. Still high pen, basically the specialty round you have when you need to punch through a heavy’s armor.
HEAT/HEAT-FS:
High pen, and high damage on anything the jet actually touches (i.e. ammo, crew, etc.) Very good at starting fires and cooking off ammo.
HESH:
Extremely good against angles, and thick armor in general. Would have a chance to overpressure, around the same as HE, but within a smaller radius.
HE:
Basically same as current, haha 155mm big boom.
APFSDS:
No idea, because I admittedly dont have it yet, and so cant really speak about it.
And now just for the memes:
Shrapnel:
Against non-closed tops its the same as current, but if it pens a closed-top viecle it dies instantly. Cause this round sucks otherwise lol.
Yeah, this isnt realistic, but I have never been a subscriber to WT having to be ultra-realistic. Where rounds post-pen damage is concerned, I think balance and round variety are more important- if APHE was just slightly worse pen, slightly better damage AP, there wouldnt be very much variety nor difference between. I like how APHE atm is radically different then AP in its post-pen damage, but I do think AP needs better post-pen. In the end, its a game, not a hardcore simulator, and I think it should be treated as such.