Correct - the hanger can only accommodate the biplane. That having been said, in order to accommodate the other aircraft too the hangar would have to be huge, with an enormous footprint, and a substantially increased parts count. As a result, I'd estimate a price up to double the current RRP which I suspect few of the target market would pay. LEGO therefore got the size of the hanger right IMHO.
Other than the planes, I do find it unfortunate that the Friends set focuses on shopping and food like so many Friends sets, and I also think it is unfortunate that the City terminal only has the basics of the airport structure in the control tower and service truck. Having a control tower for the Friends set would have been great. Having a gift shop/cafe for the City terminal would have been a worthwhile addition and not something we have seen in many City sets.
Almost all major European carriers have a connection to Copenhagen from their main hubs. As Denmark holds sizable immigrant communities from various European countries, even smaller carriers have frequent connections to the likes of Sarajevo or Belgrade. Copenhagen Airport has been seeing increased traffic from low-fare carriers since the launch of the dedicated CPH Go section of the airport (with common check-in and security with other airlines, but separate gates and waiting area). Airlines using CPH Go include EasyJet, Ryanair, Transavia, and WizzAir, although the latter only for selected destinations, with the majority of its flights to the Øresund area landing at Malmö Sturup Airport instead.
The two stunt jets included here actually have some similarity in the basic design and colour scheme to the main piece seen in the Marvel Super Heroes Avenjet Space Mission set. With that being said, I loved the Avenjet in that particular set, so any similarity holds no issue with me. The red and white colours work really well together, and it looks like something you would genuinely see flying through the sky at an air show. I really love it when LEGO truly capture the essence of what you are building, and they do that here. The jets themselves, as I said before, are similar to previously-released jets, and therefore the builds won’t come as any main surprise. That shouldn’t detract from the product, however, as it is a prime example of LEGO finding a winning formula and not really needing to change it.
Other airlines offering intercontinental connections to Copenhagen are SAS's Star Alliance partners Singapore Airlines (to Singapore), Air Canada (to Toronto) and Thai Airways (to Bangkok Suvarnabhumi and Phuket), as well as competing SkyTeam carrier Delta with a seasonal connection to JFK and Pakistan International Airlines to Islamabad and Lahore.
Compared to other major European hub airports, like Charles de Gaulle or Heathrow, CPH has a similar number of connections, but is much smaller in both actual size and passenger volumes, and can provide a calmer, more pleasant experience. Its location in the south of Scandinavia makes reaching most European destinations reasonable, and flying to destinations in the Baltic region and in Eastern Europe generally only takes half the time as from major hub airports in Western Europe.