I remember hearing that Dobs said that he was equally proficient on both sides. If true, he would be the ideal 7th D, while acclimatizing.
I don't see an issue with the current status of RHD's, no need to panic. Chuk is going to slowly fade out over the next few years, giving us a cushion for the kids. And we can get a decent return for Mayfield, I believe.
I say we keep them all for this year, unless a sweet deal pops up. Trade Mayfield in the off season, go with Pulock, Chuk, and Dobs, with Hutton as the 7th. In a year or two after, Chuck is more of a mentor, and Wilde (obviously if he evolves properly), steps up.
Bring along Dobs slowly for now, and if he transitions well, he may turn into a Black Ace for us.
Right now, we're tied with COL for 9th, in PP%. If we continue on this way, I really am comfortable with staying put, for this year.
I also think that Beau, Barzy, Pulock, Toews... all have the potential take a step forward, with probably only Chuk expected to slow down a bit.
I am ok with seeing how we fare for a few more weeks, before we consider the panic button...