The Vaude has a catch on the hem between the legs to stop the wind blowing it up over your face. On my old one I used a bit of elasticated cord around my waist on windy days so never had a problem that way. My wife has stiched a "belt" to the Vaude that adjusts whether I have the back pack flap open or not.
The hood is a whole different question. It works as well as all the hoods on my rain jackets. If the weather is really awful I wear a cap underneath it.
The main thing about the poncho is its is a Jack of many trades. Groundsheet, tarp, modesty changing room, great waterproofing, reasonably ventilated due to its shape. Simple to deploy. Saves the faff of rain trews.
It isn't a great weight saver if you get a good one. It takes a bit of getting used to using one, jackets are a doddle because we are used to them. You need to break them in in your mind.
Have to say I do not truly like the hood. Mrs. Jimbob is thinking about improvements. First thought is to put a press stud fastening collar around the hood fastening under the chin and altering the drawstring positioning to pull the hood into the back of the head and around the ears leaving the top to cope with the wire stiffener and not be pulled over the forehead and eyes.
Jac. I won't be posting Piccies , but without committing myself to it may post a youtube video, with help from one of my grandchildren when the work on the hood is finished.