This is also the first time I've posted here, and I backed the game as well. I love Obsidian games and all of the games made by its employees from before there even was an Obsidian.
Please don't change the memorial. There is currently a high-tension outrage machine tromping through cyberspace right now, and it has set its sights on Pillars of Eternity over one backer's limerick, and threatening to "not buy the game" and trash-talk it over such a miniscule thing.
The person who wrote that Twitter post does not have your or anyone's best interests at heart. Just look through their histor