Shield Extender suck armor plates are better

Fixed

Proto extenders are fine advanced and basic are not they could use a small buff (33/44/66)

Regarding plates scaling is weired on plates you gain 30% more HP from basic to advanced but only 22% from advanced to proto while penalties scale from basic to advances +50% and from advanced to proto +66%...

Ferroscale and reactive plates are only highly situational thanks to the fitting reqs...

would encourage more module diversity and reduce tanking

They already have something worse than a stacking penalty as I recall. There is NO stacking penalty on the Speed hit from Armor plates, meaning the speed penalty quickly mounts.

The progression of both extenders and plates is a bit uneven at the moment:
Shields go:
22-33-66 hp
18/3-36/6-54/11 fit

22 is so little hp, that it's practically pointless. It's hardly going to preserve the life of a fearful new player without better skills. So, that's bad... but ADV is only 11 hp higher? A... 50% jump I guess? Then you go from 50% jump... to 200% jump. It's not even close to even.

Fitting is at least pretty linear, the CPU increments by 18, while the PG doubles more or less. It's interesting to note that the "high power slot" shields actually have about the same power reqs as armor at ADV/PRO.

Armor goes:
85-110-135 hp
10/1-20/6-30/12
2%-3%-5%

Unlike shields, armor has a flat linear hp progression, +25. The fitting is also pretty flat. CPU progresses by +10, and the PG is more or less a +6. It gets awkward because the penalty jumps more between ADV/PRO. So, you get a 1% gain.. then twice that. The CPU/PG cost stays flat, and the hp gain is the same.

Basically, it's the opposite of how you might expect it to go. On shields, the rise in cost between tiers is pretty flat, but the gains quadruple (or triple if you put it in terms of hp instead of percentage). On armor though, it's the hp gains that are flat, while the relative penalty increase doubles.