Personally I love the the A320 series it is one of the few aircraft that has a life cockpit However it is nowhere near the level of the new 777 or the upcoming 757
These are the features that would have to be added
Working cargo doors
Passenger doors
See through windows
Cockpit window opening
Realistic engine sounds
And liveries
Primary liveries that should be added are the new United, Bhutan airlines, Nepal airlines
Also do not forget the correct engines in wing which based on the real world airline
The A320 won’t be considered for a long time mainly being because we already have a live cockpit on it and touched up engines. And it’s a duplicate of another topic.
Feel free to vote for additional features to the A320 family like the A320 NEO Family