TCP-IP for financial transactions - I love it.  But the protocol is presently very weak and disorganized with a bunch of loonies running the foundation.  I don't think the foundation in the present state is strong enough to protect and advance a protocol for something so important as money.  I think the foundation - rather than a technical defect will be the ultimate demise of bitcoin.  Now let's try to imagine what the second embodiment of 'the foundation' could be?  UN, US government?, Private company?, a new replacement foundation of better quality? Whatever it is, it will be forming itself pretty soon.  

If an address collision happens, it'll be because of poor random number generation.  The probability of random addresses colliding is so ungodly small that it will never happen in the entire life of bitcoin.  The fact that you think it's possible is more demonstrative of the failing of the human mind than the design of bitcoin.  The sheer number of addresses is simply unimaginably large.