Well as far as the first meeting, no it's not but remember Grand Admiral Hallice retired not all that long before and the new Grand Admiral has been busy trying to pull the peices of the military together so no real time for face-to-face conferences with the other members of the military council.
And on to the ship classifications well I've been referring to the ships by size since the start of my story so it would seem a little inconsistent to suddenly drop all terms for my ships like the Yu Hing Pe "Super Dreadnought"
As far as comparing sizes for the non-conventional roles I do think I'll just leave that up to a general size comparison as you suggested for example just a "Large minesweeper" or in the case of Federal Security ships just a general "Medium and Large Peacekeeping ship" would work.
And as far as stating the actual size and tonnage of a ship I don't really see a problem with that so I'd like to stick to that
And I do have a clever little idea about that waiting just see