I agree that Dpoll is far from being perfect, but is just something to start with.
When you create a poll a user can always write in the comment everything he wants.
We can implement something better or just ask Dpoll to do some work on it, we-the-people have done some polls and we think that the results are interesting, even if the number of answers are very low.

In my opinion the first action about witness votes are not allow a single user to decide all the top 20 witness, a minimal way is to downsize votes below 20, better, I think 10.
Yes, you can split your power in many users, it's a little bit more complex, but you can do it, but not in an hour, it takes some time.
I think that a balancing of VP and number of users can be the best but not perfect solution approach.
I think that as far as one person can have multiple account all we can do is mitigate the problem but not solve.

Downvote is the greater power in the hand of whales, until there are downvotes no one can have free to speech, that's all.
It is so simple just to not vote a post, no reason to have also e downvote.

We have reputation but is computed in a very strange way, in any case what we think is completely different, because reputation can only go up, in a normal situation.

What we propose is a dynamic value that rank a user in a window of time, i.e. the famous 7 days.
You can be very active this week and no more the next, your rank changes, and reflect what you do in the last seven days (or can be in the last month).
Can be manipulated? Yes, we are back to the question, if we can use automated systems, bot, multiple account and so on everything can be manipulated, but not so easily and not for a long time.

Active user are who let all of us make money and make sense to Hive in general, so activity has a great value, also for whales, if no one post will be impossible to vote and do a curation.

We think that this point is not so clear to all whales.