I dont know if this has been mentioned before
but i feel making water fair to play with is really quite simple
1: Waterblocks can only be placed inside of plots
2: Water flow from player placed water blocks is clamped to the plots such that it is impossible for water flow to exit the plot at any time.
3: The moment a plot is removed or expires for any reason, all player placed water blocks or flow from a player placed water block is removed along with the plot.
As for the problems someone mentioned about lag, If lag is really a problem they could maybe make it such that, player placed water haves a slower update rate, which might be slightly annoying when 1st building with it, but after its all said and done, shouldn’t cause any problems.
And water updates don’t need to be reflected thru portals the same way portal updates are not reflected thru portals. also I feel this will be an uncommon situation at any rate because the water updates will only happen when someone is building with it, or someone tampers with the terrain the water is on.
If my understanding is correct, blocks do not automatically update on their own, Only an adjacent block change will cause them to update.
I disagree with this logic, when they themselves have clearly stated that they are alternating their updates between large updates and smaller ones, this could very well be one of the smaller ones, where titans are obviously going to be in a larger one.
So there is no reason water blocks can’t come out before titans, when the system for water is already mostly already in place. Where as the AI for the new mob, most likely is not already mostly in place.
I do not really feel those two things are competing with each other to the point that working on water, is going to delay Titans by any more notable amount. furthermore since this is something I consider to be a very fundamental function of the game. It would be better for them to get it out sooner then later, as i am sure alot of people the moment they see water, have some basic expectation of what they can do with it. thanks to minecraft, and then become disappointed when they learn one way or another, they can not do this basic expectation.