Honestly, the best thing to provide a better working UN security council, no nation should be able to use Veto!
The Veto right of the 5 permanent UN member is a big obstacle to reach resolutions since we had many Vetos from the USA and Russia which have hindered many resolutions to act.
Look at the Lebanon-Israel conflict for example when the USA used their Veto to block a step to stop Israel's onslaught.

The Veto option is a big slap in the face of democracy IMO.