You need to divorce yourself from the ego and pride invested in your work with ISIS, and begin moving to icons for ships that are completely distinguishable from one another by shape, versus size.

e; frigate = triangle
destroyer = square
cruiser = open diamond
battlecruiser = solid diamond
battleship = hexagon (blops or marauder = solid)
capital = star (filled = carrier, empty = dread)
supercarrier = open circle
titan = filled circle

+1000

Awesome!

Edit: After reading some of the other comments:

That "I can not distinguish them from another" sound like bullshit to me. Why?

a) The new icons are MUCH better, then the ones we have now.
b) Small screen anyone? Get a life! (Ahem a new display?)
c) I need so memorize the different shapes! Seriously? Go play WoW!

There was a time when the line "Harden the f*** up" was what defined an eve player.
To much wining today!

F
AF
BC
C
HA
HI
BS
DS
DN
CA
MS
T
RE
L
T3
ID
MA
JF
RQ

as an exercise in intuitive design, guess what ship classes those represent.

In general there were some guiding principles we used to unify the icons across all in-space objects you might encounter: ships are triangular, structures are square, celestials circular, and drones are the little claw/space invader guys :) There are a few exceptions that bend the rules here and there but in general these are the guidelines used to make the groupings distinct across all item types, not just ships. This might help explain some of the changes to the older icons without going into detail for each one.

Pithiness. These icons need more of it.

The criticism of the icons as proposed is in no way a slight on them- they are an improvement on what we already have. We're just perfectionists and I hope most people will join me in saying that we're glad you are too. Such things are, after all, an iterative process, one I understand not wanting to expose all EVE players to ("why do you keep changing X") but certainly very welcome on Singularity.

However, I do think there's a fundamental issue here, which is that icons are always going to be subjective. Some will prefer the detailed ISIS-matching icons, some might want their red crosses and white squares back, some might prefer geometric shapes, some might need high-contrast colours due to colour-blindness, others might want to colour code by ship class. This degree of customization already exists with ship names due to usage of undocumented text styling applied to the overview settings. I think that CCP would do well to provide a collection of selectable default icon sets but also allow for players to load in their own. There certainly is enough interest in such a thing (I have ideas for my own) and I'd hope the technical implementation would not be overly complex.