Complete sentences make me happy, so please use them.
A battlecruiser is like a battleship just with cruiser scale armor and increased speed.
Ok, so what does mean in the missile era? You've just given a fine 1920's definition, but a 1920s definition is no longer valid.
Also why RAM and not sea RAM?
The Mk-49 GMLS that is meant when I say RAM over SeaRAM, is prefered because it offers 21 missiles on the launcher rather than the 11 for the SeaRAM mount.
Why should I take away the Harpoons.
That's pink, so update, not remove. Not that removing the Harpoons would be a bad idea- it would help with any top-weight issues that might crop up.
Below deck hangar.
Below deck hangers tend to not work all that well. Witness what happened to the hangers on the Virginia Class cruisers.