There are plenty of opportunities waiting to be managed:
East Coast USA (NYC, PHL, ORD)
More flights / operators to Orlando
Munich, Frankfurt
Oslo, Stavanger, Bergen low cost operators
Paris Growth - AF + LCC
Madrid
Seville
Lisbon
More London Routes (LGW, STN, LCY,) to compete with rail (Not necessarily with BA connecting via LHR)
That's an aspirational list - at least half of which have been tried before. What's changed in the market to make you think they would be successful now?