Geko said in his interview they are not going to be playabale. So don't expect them either. The Jupiter Class was also apparently made to get a fast dreadnaught out there, so thats why it looks like a bathtub with nacelles :p
T5 Ship Comparison Spreadsheet
Play my missions on Holodeck!
Return of Ja'Dok Series (6 Part Series)
Enemy of the Exile Series (4 Part Series)
Task Force Ja'Dok Series (3 Part Series)
Q: (cylon74656) Will the Steamrunner Class be available for those of us who don?t play through Steam? And also, when will we see the Typhoon Class playable in-game?
Dstahl: The Steamrunner Class is a Steam exclusive, so it will not be available in the C-Store. However, you do not need to play through Steam in order to purchase this item. If you have a Steam Account you can purchase the item through Steam and claim it in game without needing to play STO through the Steam client.
The Typhoon Class is a dreadnaught that will most likely not appear as a playable ship until we increase the skill point cap to full Admiral. Even then, we haven?t yet decided if this will be a player ship, but we can be convinced to make it so if there is enough support for it.
From Ask Cryptic, December 14th, 2012
Constant exposure to the same opinions leads to continual reinforcement of ideas until eventually, any challenge, no matter what form it takes, is going to be met with a disproportionate sense of outrage. Room for reasoned discussion can no longer occur.