Hi Fandaran-- I also heard the Vent conversation and believe Wrenz said "we didn't at that moment have the # of healers we needed and thought it might take a couple of weeks" for us to be ready to raid, which luckily for us turned out to not be the case.
I also heard Wrenz directly ask Arbiter if he would be willing to give up running his own raids to come to guild only raids led by Wrenz on Wed/Sat. Arbiter did not say yes, and Wrenz asked him to let him know.
Wrenz has spent a considerable amount of time talking with those folks who raised their hands on this forum and expressed interest, gauging availability etc. This ended up being done via in game conversations and mail due to the fact that not everyone uses this forum.
Arbiter, I do know for a fact that Wrenz had shared the planned raiding days with you; I am completely behind you in your desire to lead your own raids but respectfully request you find a different schedule as we do not have enough 50s of the appropriate roles to house two competing raids. Additionally, having raids running more nights per week will allow more guildies to participate.
Please feel free to talk to me in game. Would prefer we engage in a conversation, if needed, to get past this and move on as a team