From examining rates of progress between the 3 groups in the Guild, it occures to me that at some point, everyone may be within 1 or 2 levels of each other in the future.
With the idea that we may all possibly participate in a Raid....there, I said it Kierik.......I might urge the Sunday group to consider the Normal Difficulty guidelines.
Also, after the 19th, everyone will (I think) receive a +20 Lesser Heart of Wood in order to (possibly) realign their characters according to the new enhancement setup.
This does not mean that everyone will NEED the Heart, especially in our playstyle, but it will be there.
Some players have expressed a desire to change their character, but making a new character and bringing them up was un realistic.
Discuss the options as much as you can.