It's worse than that on a basic level.
1) Can't charge and listen at the same time without a bulky expensive adapter, when Apple already offers simpler technology for this in the form of a Lightning passthrough in their External Battery Case. The solution should have been in the box.
2) Can't share a single device with two sets of headphones with native solutions, neither Lightning or Bluetooth. The Belkin adapter likely doesn't support this either, despite appearances, possibly requiring yet another adapter. The only way to split the audio signal to multiple outputs is via the 3.5mm adapter.
3) Can't use the included Lightning EarPods on anything but newer iOS devices, including current Macs, nor anything else; requiring two different sets of headphones, or using the 3.5mm adapter with an old set of headphones for maximum convenience or compatibility. This is probably the most ridiculous aspect defeating Apple's entire narrative.
4) AirPods won't be available until LATE October, leaving new customers with only existing inferior BT technology, or what's included in the box (see 3 above).
5) Once you get your AirPods, you won't be able to charge your case at the same time you charge your phone and Listen without yet another splitter. Which brings up another question, whether the Lightning camera kit (or any other Lightning accessory) will work with the Belkin adapter, and so on.
Much of this is basic functionality of the headphone jack, and is taken for granted with 3.5mm. So far I don't see any solution for most of these problems, and the solutions that do exist aren't practical.
Point 3 is the most valid point of them all. Assuming you insist on using wired headphones, you either have to use the Lightning dongle to convert your 3.5 headphones with your new phone or wait for a 3.5 to lightning adapter to use your lightning headphones with your Mac. Can't use one pair on both devices without a dongle.
The ideal situation is just to convert to Bluetooth (which I've already done) and you won't have an issue either way.