"I think HF21 has its flows, yes it redistributes more to SP holder, but through this it will bring more investors, therefore more Buying pressure and a better STEEM Price I Believe."

Why do you think it would bring more investors? In fact I think if Steem has such a great future the price at which it is now should already be bringing in masses of investors, Steem has been alive for over three years you would think it should be very well known in the crypto world and yet while all other coins surge it stagnates in fact it goes down.
The 50/50 reward is betting on the big holders changing their voting habits and that they will look for the best content to curate, I don't see it that way I see these guys getting some percentage points of rewards more for the same thing they are doing now with no benefits for the rest of us, idem for the other two EIP ideas.