1) Block size. Satoshi could have probably anticipated this, and he (or the team) should have written some code allowing an easy expansion through time... Whatever developers "win" the block size tangle, please think ahead guys!
Wrong. This is not a fix and makes no sense from a technical perspective. If anything it could kill Bitcoin (if there were no infrastructural improvements).
2) Limited acceptance by merchants (the principal thing retarding BTC growth IMO). I do not know how to fix this one. Time and customer demand?
This is not a flaw in Bitcoin.
3) It is HARD to buy Bitcoin, especially quietly.
Neither is this.
Mining pools and mega farms..
I think the code should have something to disincentivise the centralization of mining. I don't think rules that disallow it would be the answer. More like built in conditions that the free market will turn into decentralization rather than encourage centralization as it is.
This makes sense. Centralization is indeed a problem, albeit nobody has a real solution for this. Incentives to run nodes would be also nice in order to relive the costs and promote decentralization.
i would change block size no matter what the situations would be..
Read the first part of my post.
So why doesn't someone just create a new Bitcoin and just fix those things?
Because they can't. Let me try to explain this somehow; people that don't have the sufficient knowledge and technical skills think that building a spaceship (where spaceship = solutions to all inherent problems that Bitcoin has) is as 'easy' as stacking a few blocks on-top of each other.
