First of all a new, redesigned Bitcoin should have some kind of AI to ensure that socialists and fiat money speculators are excluded from usage...

Joking aside, I think the most important aspect that I'd like to see being changed is confidentiality of transactions. Right now, Bitcoin payments are only pseudonymous and once addresses get deanonymized it is very easy to reconstruct the entire transaction history of a user. It's also problematic in regard to Bitcoin's fungibility, because blacklisting of coins could be easily established by tracking coins of "bad origin".

I really hope that Bitcoin improves in the privacy field, because it may become necessary for its survival when governments and central banks are getting desperate, seeing their fiat scam monetary system collapse...

ya.ya.yo!