Overall, the second world event seems to be much better put together than the Battle of Lumbridge was. It's shorter, it has PvP, the votes are closer together and seem to make more of a difference, and many other things are improved.
That said, it's certainly not a perfect event. There are several things that can be improved, and if all of the changes in this thread were applied, the event would be much more fun for everyone, as well as better balanced.
One of the biggest problems with this event is that building/destroying/repairing is simply way too slow. It takes way too long to actually be worth it most of the time - the only real use for it is to gain renown. It takes too long to actually be strategic. It's as if it's balanced to have 1k people working on a node at the same time...
Imagine a game of conquest in Battlefield that took 10 minutes to capture a node. Would that be fun? No, instead everyone would ignore the actual points and just kill eachother. Sound familiar? It's exactly what's happening in this event.
So, how should this change? First of all, it's important to understand that the current building speed is reasonable. It takes a while, but it can be dealt with.
The destroying/repairing speeds, however, are abysmal. What should happen is simple: the destroying speed should be half of the building speed, and the repairing speed should be a third of the building speed.
This makes it easy to build, but still harder to destroy, while at the same time making destroying a point actually have an effect. Also, repairing is currently absolutely pointless - it does almost nothing. This would also make repairing useful.
Another important change that needs to happen is to lift the cap on building speed. Currently, when you hit 30k renown your building/destroying/repairing speed seems to be roughly a third of what it was while you had energy left. As if it wasn't slow enough before, after capping your efforts hardly affect the buildings. Why should this be so? If I want to continue playing the event after I'm capped and I'm getting minimal rewards, why should my efforts be hampered? It just doesn't make sense, and once again removes any strategy linked to nodes whatsoever.
An issue currently with nodes is that they give easy afk renown. That's not a problem in itself, however it encourages people to just afk them for their 30k renown per day. This in turn leads people to repair nodes, even if they're at 100% health already.
To fix this, there is one logical solution. If the node is at full hp it could simply not give renown for repairing. This could be done by preventing people from repairing or just by making it give no renown for repairing while at full hp.
This would force people to actually play the event, instead of Runescape Gold just afking a node for 30k renown. At the very least, it would force people to afk different nodes.