well, this are 2 completely different concepcts, and none of them is even slightly close to the original
1. time based reward
this is fail by design. super unfair distibution. you cannot distribute by time based on global difficulty and current protocol.
False, this is exactly what the original concept hoped to be. If there is 1 coin generated per second, coins are effectively distributed by hashing power percentage.
2. difficulty based reward
nothing is changed, just another altcoin.
False, this solution also addresses all the issues I laid out in the OP.