Want to remove ceiling in cottage to create vault look.
Your two diagrams are for two different applications. To move the rafter ties up yet staying in the bottom 1/3 of the total rise is do-able. The rafters need to be sized for the added drywall application as do the fastening to the rafters. A new sized ridge beam with proper fastening and bearing to the earth is also do-able. Both would require a building permit to meet minimum safety guild-lines.
Clothes taking longer to dry?
Clean the dryer screen in HOT water if using fabric softener sheets.
They leave a residue that impedes air-flow, costing you money.
Clean the ducting in the last six months? 17,000 dryer fires annually!