Upgrade will be 1 level to Superior as an AMB, room still won't seem huge but trust me its a big improvement! They sell lounge access so unlikely to offer it free. You will find breakfast expensive downstairs but numerous options outside.

Better option may be to ask to buy up to a club room, this gets you more space depending on room allocated and lounge access. If you are about for the evening champage and canapes it is not a bad deal.