As you well know, anything that 'bleeds' air for ANYTHING from your G suit to cockpit pressurization to whatever, reduces thrust. Boeing has chosen an engineering solution to not use bleed air in order to not reduce thrust and increase fuel efficiency. And, imagine that, there are some growing pains. Disclaimer: I'm a retired Navy fighter pilot now working for Boeing, but trust me, the F-22 has had significantly more problems than this and they continue production and flying. And, the F-14 (particularly with the POS P&W TF-30 engine) had staggering problems, but fought through them. Similarly, Boeing will figure this out and the 787 will be a great success. In my humble opinion, of course!
Regards,
Gus