As it has been commented in other iPhone Air posts: it’s better to wait one or two generations to get the iPhone Air, for several reasons. One, the battery technology will improve (the battery for this year’s iPhone Air will have the same composition and design). Two, the SoC will get much more efficient when they switch to the new 2nm technology. Three, this iPhone Air is said to use the first gen C1 modem, which is more power efficient than Qualcomm’s, yes, but I suspect the following C2 and C3 will offer better performance at lower power consumption, or… who knows! Maybe it even comes embedded into the main SoC!
On top of all of that, this is a new device from Apple, a first gen device, and any flaws that this iPhone shows over the first months will likely be addressed on the next iPhone Air model.