On the plus side, the average standered of 3rd party is far higher for CFS3 than CFS2.
I take issue on that wild claim.
Whilst it is true that CFS3 requires a different set of skills, and a whole new learning curve, to create 3D Cockpits; compared to the more accessible 2D Cockpits of CFS2; it is extremely insulting to suggest that the end result of a 3D cockpit is of a much higher standard creatively than a 2D cockpit. Friends of mine who design CFS2 aircraft would also be highly insulted to be told that CFS3 aircraft are on average better than what they create. So I'm sure you really didn't mean to imply that.
What I personally dislike about CFS3, is the fact that it comes with 3D cockpits, all of which, native or third party, I consider to be extremely ugly and lacking in detail when compared with most 2D Cockpits for CFS2.
And if you compare the 3D Cockpits of CFS3 with those of IL-2 and/or LOCK-ON, I would suggest that CFS3 is completely in the mud. Although, this is probably down to the Microsoft Engine rather than the creative talent of third-party modders.
What I do like about CFS3 is that it gives me the chance to fly multi-engine Heavy Bombers, which CFS2, even with third-party add-ons, cannot quite do as well. And again, I believe that is down to the limitations of the Microsoft Engine.