To be honest, I can't imagine the sound quality from a phone being so good that it bothered me that much beyond a certain point.
I have a Metrum Acoustics DAC and headphone amp pair, connected optically to my iMac and Mr Speakers Alpha Dogs to plug into that lot if headphone Nirvana is what I require.
My phone just fills in with reasonable music quality and portability on the road etc.
Personally I find it an odd (rather than 'courageous'!) decision to dump a connector that just about every person using your device makes use of, simply to make your phone some irrelevant amount thinner.
I guess it will play out well for Apple as these things usually do, and the phone is nice by all accounts, but it still seems odd to me.