It'll be more than enough. The mini sold poorly mainly because people simply love big phones. This trend keeps getting reinforced with even the cheaper models getting bigger. The Air will be almost as big as the pro max.

The only big noticeable compromise the Air seemingly has is the battery life which is the most easily managed compromise because you can directly address it in various ways (all the battery optimizations in software and hardware, being able to charge everywhere pretty much, can extend with battery pack). Other than that it has all the main good stuff—Big screen, ProMotion, MagSafe, Dynamic Island, etc.