Events made for Trammel shards won't work well here, we need a EM, who don't fear our ruleset and can make the events so they fit Siege. I know that's not an easy job but I believe it can be done. We will miss EM Aurora, she did well.
I would never expect a Siege event to be without some killing. In the past, we had had alot events on Siege, player runned, also when we was alot more players. That be bazaar event at large guard fort at safe haven, UDL knighting events, wedding hold outside the buildings in a player town and my NEW2 event yesterday. Some killing won't ruin the event and The Captain's little lightning show did not ruin my event, the members and guests was staying after they was rezzed and did not complain about it. I believe all had a great day they will remember for long time. Some may tell stories about them sitting next to a thief and a red drinking danish akvavit and eating pizza.
Some may say, it's bad when thieves steal an even item or PK's kill to get it, but if the item can be picked up later, like with the roses, it's not all bad. Look at it as a challenge to get your event item home safe. Siege bless it, use bag of sending or use a trapped snoop crates.
I believe the biggest problem is, Siege had a few very peaceful years and people forgot how to protect them self and their items.