For me personally, charging speed would not be the issue. I tend to avoid quick charging anyway, since the added heat might have influence on the lifetime of the battery. As long as it is from empty to full over night i'm fine with slow charging speeds. Though faster charging on demand would be a nice feature.
What i could not live without though, is the option of getting my photos off the phone without using the internet. Plug in the cable, allow access, and you can easily pull everything off. The direct connection is also essential to recover the phone via iTunes, so it is reassuring to have that option. And yes, i had bricked iPhones that i did need to recover.
Of course it might be possible to do local wireless connectivity with the fast charge pad, but i think that would be slow.