Will there be an option to save ones account with 2FA in future?

What do you think about a reward curve which started as n^2 / exponential (thus flat), and then later changed into linear which would work against self-voting as well as excessive rewards.
(With spline interpolation one could get a curve which is more beautiful than my example, without a buckling.)

I never really understood the sense of that curation window (of currently 15 minutes): bots can be programmed to upvote after 30, 15, 5, 3 or 0 minutes after a post was published anyway, so how does a curation window decrease the advantage of automated vote bots?

What do you think about 'diminishing returns', meaning that voting power decreases faster when upvoting (or flagging) the same accounts (inluding own ones) again and again instead of spreading ones upvotes to many different accounts?

The current reputation system is completely meaningless. In everyday life 'reputation' means that other people respect you. Here on the STEEM blockchain it means, that you earned much money (for example by upvoting ten own short posts per day with whale power and get the highest reputation in the whole STEEM comos by doing so).
What do you think of alternative reputation systems like User Authority (UA) implemented by @scipio and @holger80? Do you consider supporting them delegating them some STEEM power?