We have done 3 rooms with Allure, and will use it in our Damon when the carpet is worn out.
The Mrs. wants all the carpet gone in the end just like the OP's situation. Throw rugs will be acquired as desired.
Do not glue down the Allure. It is a floating floor and will buckle and lift if glued down.
Leave a small gap along all the walls for expansion and contraction. Cover the raw edge with a matching molding (match the wall or the floor -your pick) mounted not too tight against the flooring. If there is any chance of water going under the edge of the Allure (bathroom, kitchen, and entryway) use a nice fat bead of silicon or similar material to keep the water above the Allure...you DO NOT want water getting under the flooring, because it will never dry out and will rot the subfloor out from under the Allure.
Ensure the subfloor is as flat and clean as possible before installation, but the Allure will span 1/4" holes in the subfloor if needed (less filling needed than other products).
These steps are all written-up in the Allure instructions, but some do not read instructions.
About the fascia's covered with carpet...it's less easy to address. Damon covered many of these little pieces with carpet in our RV too...like around the engine doghouse. It is just glued on. You will need to figure out what you want (new carpet, painted wood, varnished fine wood finish?). It's all up to you.
Best luck and please share more pics of the project