Not sure why people would want to get rid of Ruud. His group is doing very well.
I don't think you touch the defensive side of the ball, unless some leave on their own. I've seen where some say it's common for teams that run a 3-4 have two LB coaches. The thing is, we really haven't ran the 3-4 very much this year. Possibly have Ruud coach all LB positions and replace Dawson with the ST coach. At this point, I don't see why you would get rid of Ruud and keep Dawson if you're going to make a change in that area.
If Frost stays, I would think Verduzco, Austin, Held are replaced. TEs and WRs are playing well.