Whereas before your voting power increased exponentionally, it now only increases linearly. This meant that people with less steem power didn't have much influence on the payout, while people with A LOT of steem power had exponentially more influence on it.

Now, voting power increases the reward linearly. To give a really simple (and perhaps incomplete) example, a full power with with 10SP would equal a 100 votes with 1SP. In other words, if the SP was 10 times higher, the vote would be 10^10=100 times more powerful.
After HF19 the same 10SP vote is only 10 times as strong as a 1SP vote. It went from exponential increase to linear increase.

So now that 'smaller' steemians have more de facto voting power, their voting power also depletes faster. So yes, you'd have to be more conservative if you want to give full power votes to posts that you really enjoy. And that's what I would advise people: only upvote great content!

I hope that helps! Sleep well brother.