[SHIELD EXTENDERS]
Problem:

Basic shield extenders are not worth using for only 22 more shields.

Likewise, enhanced shields give too little HP. 33 more HP basically only protects from 1 AR shot.

Complex shield extenders are good and require no changes in my opinion, but it is troubling that they give 100% more HP than enhanced shield extenders; progression is clearly not right.

I personally don't bother with shield extenders unless they're complex, and I know others who feel the same way.

Solution:

Buff basic extenders to 33

Buff enhanced extenders to 44

[SHIELD REGULATORS]
Problem:
As a low slot module, shield regulators are in direct competition with the much more attractive armor modules. Ideally shield regulators should be more attractive to shield tankers than an armor plate.

Basic: 10%
Enhanced: 20%
Complex: 25%

Values are too low for significant effect

Difference between enhanced and complex is too low

Solution:
Basic: 20%
Enhanced: 30%
Complex: 40%

Additional concern:
The Caldari scout has unnecessarily and obscenely high shield recharge rate, combined with extremely short shield recharge delays. These have to be reduced, or else my proposed changes will lead to further imbalanced with the Caldari scout.

Anything over 30% for shield regulators will put the shield delay under two seconds when stacked. Is that intended? Caldari assault with ~400 shield hp and ~60hp/s recharge and delay under 2 seconds? Combined with mobility, you wouldn't kill one of these unless you grabbed him by the neck and shot him in the face lol