Staying on topic is good, mmkay?
What happened in the CTF event was an ideal situation where there were plenty of mods and players online. All three of the servers have their lull hours in which there are very few players and no mods online. If we didn't have safebuckets enabled, someone could come on in those lull hours and grief a large part of the server without anyone noticing until much later.
It may be true that the original intent of the plugin has become redundant, but it still stands as a great and simple anti-greifing plugin.
If we were to limit the use of this plugin, I'd agree that there is little need for water flow to be restricted, though I still fully stand by restricting lava flow.
I've suggested Glacier in a meeting a few months ago for PvE, but there were some concerns about permissions in large town-type protections, which can reach upwards of 200 members in a single protection, and how that would complicate things.
I've talked to the author of the plugin about this, but from what I can remember, we came to the conclusion that there would have to be an exclusive distinction between the type of protection in WorldGuard (town or private) for Glacier to hook into, which doesn't currently exist.