Having spent a few hours with the update, some further thoughts.
It doesn't seem to have broken, or be broken by, any of my scenery, add-ons, or legacy port-over planes, which is nice. However, SU11 did break Simconnect. The apps I run through Simconnect - Little Navmap, Axis & Ohs, and Where Are My Aircraft - are all broken to various degrees. In general, they work for the first flight of a session, but on subsequent flights exchange date with the sim only while in Active Pause. This is a widely experienced problem and MS will have to fix it.
As far as the aircraft:
DHC-2: This is the pick of the litter for me with the systems depth, tablet control, handling, and appearance.
DC-3: Better than expected. Performance matches the numbers quite closely. Handling lacks a little of the authentic inertia feel. I guess that's a factor of control input lag and non-linear response not being tuned quite to my liking.
GOOSE: Nice plane but only a little different, not better, compared with the Big Radials. You can get nice skins for the Big Radials. And the OZWookiee free G-21A still adds value with the retracting floats.
RYAN NYP: Surprisingly fun. If you try this plane, you might find it is not one that you'll just fly once or twice. It is great looking and the performance and handling are enjoyable. Despite the obstructed forward view and near useless periscope (which I'm sure is authentic), it is not too hard to fly looking through the side windows with TrackIR or, I imagine, VR. I wouldn't try it without one of those. But with those, I can imagine showing up at some multiplayer fly-ins with it, especially since everyone else will have the plane and be able to see what I'm flying.
JN-4: A little disappointed in this one. I find the performance more anemic and the control less coordinated than I expected. Maybe I'll get better at it, but not a favorite at the moment.
WRIGHT FLYER: Doesn't feel right. Too easy to control, for one. Also, too little power for sustained flight. I'm not sure the Wrights would be credited with the first "powered, sustained flight" if the Flyer had only enough power to stretch a glide after being catapulted into the air. I guess the point is to make it impossible to fly more than a few hundred yards, but the reason that was true of the original wasn't inadequate power, it was that the thing was too uncontrollable to fly for more than a minute or so or to handle any change in wind direction. Does anyone else remember the 2003 "First Flight" sim package which included a Wright Glider, Flyer, and Model B? That felt better than this. A Model B, something just a little more airworthy than the Flyer that could actually do circuits in Ohio or France, actually would be a nice addition to the sim. You can get a little of that feeling by spawning the Flyer 1,000 feet or so in the air and circling down to land. I wonder if you can catch a thermal in it and fly around a while.
SPRUCE GOOSE: I'm of two minds about the fact that this plane jumps off the water and flies around like any big boat, versus Hughes being barely able to pull it off the water in real life. Or was it really that underpowered? If they were going to mass produce this thing, it would have to fly at empty weight a lot more like it does in the sim than the legends we have heard. Anyway as with the Wright and Ryan, I can't help feeling that too much work has gone into this to just try it once, shrug "OK" and move on. It would be nice if there were more designated water runways around major coastal cities, which don't exist any more but once did, so that we could treat this plane like a big Clipper and fly between major destinations.
GLIDERS: Enjoyable. I had the Discus and soaring is occasional good fun. The towplane deal is cool. I can't figure out how to turn off that annoying descent-rate tone.
HELICOPTERS: More fun than I expected. Reviewers like Into the Blue have said that the chopper physics and controls seem to be dumbed down, and I agree. I never could get the hang of the egg beaters in FSX and P3D, but here they are quite easy to control. Maybe too much so to feel realistic and challenging. But it's fun to be able to fly right up to the scenery and get a good look. I tried the intro helicopter flight from lower Manhattan and enjoyed darting between the buildings and landing in Central Park. If one of the publishers were to do some of the wonderfully hideous classic piston choppers for the sim, like the Choctaw, Chickasaw, Mojave, or Flying Banana, with more realistic physics, I'd give them a try.
A310: This is the one I haven't tried yet. I'm not a tubeliner guy but I understand that this is almost a payware grade airliner, which is great for those of us who would never pay for such but might want to try one someday. I feel like I should learn the A320 with its simplified systems before I try this.
HISTORICAL AIRPORTS: Fun having Meigs and Kai Tak in the game. Lining up in a steam gauge 172 at Meigs is the ultimate "How it started / How it's going" meme for MSFS. As long as they can be disabled in CM, I have no issue with MS giving us more of these.
) Now we can only imagine how extremely wonderful it would be to see this magnificent iconic aeroplane take-off, fly and land in Fly-By View. I think it's ashame really that we still can't ! 
Had to fumble something together using another reply from you. Hehe.