A shouter NPC is definitely do-able (and less upkeep than giving out megaphones). What would an appropriate cooldown be between broadcasts?
We can also increase the rewards this week.
For the guardians....it would also reduce the power of WoE guardians as well. We're not able to create separate BG only guardians.
I would consider 2 options with BG shouter
1/ Global access with a 15min cooldown
and/or
2/ one activated by approved acc IDs with a 5 min cooldown. This way it allows for sometimes evil necessary more verbose messages, such as "Flavius has just bugged out, please wait 15 mins", or "We are using the ____ room, join us!" I always feel shy to "spam" the megaphones, but sometimes it is just necessary to get things rolling.
Good on the rewards, this will make people very happy. Remember, it is Tierra that needs buffing.
Guardians, well the change would be mostly pointless if the respawn bug isn't fixed. But I honestly have to say eff the woe 2 guardians, they one shot a lot of classes w/ eske (which wouldn't be as much of an issue if we didn't have some of the insane classic specific gear that increased player damage a lot) they are also increased in damage because of stray investments in defense in unoccupied castles. Tho people may not agree with me, I have no affection for WoE 2 guardians as the population is too low on this server for one shotting people with an NPC to be justified. Now if we had a healthy population they would be fine. Guardians shouldn't be able to 1 shot 1/0 of any guild. #my2cents
There's also an AI problem with the guardians, where their AI can bypass portal immunity. (their agro doesn't reset once they have targeted one player) tldr; I think they are dumb.
This does however raise an interesting question on if guardian AI can be made to replicate bg guardian AI in WoE. Being able to place guardians without being gkicked would be interesting! (it would be a case to severely nerf them).
Unless of course you mean they have WoE 1 guardian stats (could you replace them with those?) which changes everything.