I'm currently leaning toward getting the Mavic Air. Reasons:
1) First drone, so not replacing a Mavic Pro or anything
2) Not sure about my usage habits but I think I'm unlikely to be pushing range limits. If I am it's because I have gone full drone in which case buying the MP2 will probably follow anyway.
3) Trusting that extra batteries will make up for lower flight times (see #2, don't think I'll be doing marathon video shots).
4) Better video, better sensors
5) Smaller means more likely to take it with me
6) I'm impatient
Forgot 7) Sounds like the MP2 will be a step up in price (like Air was a step down); I'm more comfortable at the lower price point.
Certainly these reasons don't apply to everyone, fortunately we live in a world with many options! The WiFi does seem like the largest point of concern - it seems to work better for some people than others. If it doesn't work out that will probably be why.
...who am I kidding, if it doesn't work out it will be because I didn't read the manual and crashed it on the first flight.
Why not get the Spark for less money? Then you can practice and With the experience you’ll be a Pro when the MP2 comes out!