well I've done my research with the search tool, but I havent found anything about what
ill suggest for armor.

Well here my suggestion :

Instead of making the armor for bouncing ability, why not change it for decrease damage?

like for now the only thing that armor is doing is bouncing shell if the ship got enough
armor, I know some people will said : Use AP! Well to say, I'm not enough good in aiming
to waste a bind of HE for a bind of AP

So instead each inch would make the damage received decreased and why not making its
destroyable just like bulge, the armor would get its own health bar. and if its reach 25%
some of the hit would damage the hull itself ( the current ship HP )

here some % could be used for damage output:

Armor 100% HP
AP : 100% damage on armor
HE : 50-75% damage on armor

Armor 50% HP
AP : 100% damage on armor, 10% damage on hull
HE: 50-75% damage on armor

Armor 25% HP
AP : 100% damage on armor, 25% damage on hull
HE: 70%-90% damage on armor, 10% damage on hull

Armor less than 10%
AP: 100% damage on armor, 50% damage on hull
HE: 95% damage on armor, 30% damage on hull

No more armor left
AP 50% damage on hull
HE 100% damage on hull

so in some way armor add HP on the ship, HE still do less damage until the armor is on a
critical status, AP would do the maximum damage on armor and even break through damaging
the hull itself too ( doing technically more damage overtime until armors gone )

Well if people still want some bouncing stats, well maybe make it 5% probability of
bouncing HE, but not 100% like NF is doing right now with high amount of armor.

and for HP point, i would say(still depend on where the shell hit):
(Per inch)

UK
Deck: 1.5k
Belt: 1k

US
Deck: 1.1k
Belt: 900

KM
Deck: 1k
Belt: 800

IJN
Deck: 900
Belt: 700

MN
Deck: 1k
Belt: 900

But doing armor like that, that would be more fair to reduce the weight of armor ( except
UK since theirs is already kinda light )

Then Armor DP would not get the DMG reduction of the SD

so lets do an exemple of a battle situation

You are an UK ship, vs another BB that can do normally 1-2k dmg per shell

you got 10 inch of deck armor and 2 inch of belt, mean you got a bonus of 17k dp ( again
SD do NOT reduce dmg on armor hit )

you receive 3 shell hit at 100% armor:
If its was AP, its would have done 3k-6k dmg on the armor
if its was HE you would have receive 1.5k-3k dmg on the armor

if its was 50% armor
If its was AP, its would have done 3k-6k DMG on the armor + 100 dmg on hull ( on hull SD
apply)
if its was HE, you would have receive 1.5k-3k dmg on armor

if at 25% armor
If AP, would be 3k-6k DMG on armor + 750-1500 on hull
if HE, would be 1k-4200 dmg on armor + 100 dmg on hull

at 0% armor
AP would do 1k-3k dmg
HE would do the normal damage

And go on, so pretty much of people still use AP on armor, armor would be gone soon, but
even with HE its still do enough dmg on armor to break it in couple of volley ( just like
SD would be break after couple of volley).

Here was my suggestion, the flaming can go on!