Lisette B6385 coat pattern questions

I would like to make this pattern using boiled wool only with possibly a lined sleeve to facilitate my arms sliding into the coat. What kind of adjustments to the pattern for an unlined project? Would you recommend boiled wool and leaving the coat unlined? Would I have problems with the wool possibly cupping in the seat area without a lining to stabilize the wool fabric? Love your patterns and I am looking forward to making this coat for the first time out of raspberry colored wool to brighten dreary winter days!!