Your account has voting power as a percentage, 0-100%. When you vote, you consume a percentage of the voting power. The delta is consumed and is used to determine the exact number of shares you give to content (Those shares are then used to determine the actual reward at the time of payout, but more shares means more rewards). Currently this is tuned such that voting 40 times in a day breaks even with how quickly your voting power regenerates. Voting power will regenerate from 0% to 100% over 5 days. 40 votes a day over 5 days means that you use 1/200th of your voting power (or 0.5%). That all assumes you only do 100% weight votes. The actual consumed voting power can be less if you do not vote 100%. In which case it will be harder to vote down to the regeneration breakpoint. For every second that you are at 100% voting power and not voting, the regenerated voting power is effectively lost.
The proposed change will allow you to use more of your voting power in a single vote so that it is easier to reach the breakpoint and fewer users will have wasted voting power.
RE: Proposing Steem Equality 0.19.0 as the Next Fork