That wrap looks fine to me. You might narrow it up a little more, but it's close to ideal if not already there. IMHO.
I use the locking loop, 3 wraps around the base of the guide, for all single foot guides. I have had a couple small guides pull out when the locking loops were not used. Not very often, but has happened. It is so easy and fast, and unobtrusive, that I have chosen to use it all the time on single foot guides. I don't always use the recommended blocking wraps after the locking loops and haven't had problems. https://www.rodbuilding.org/library/forhan.html
Regarding filing the feet more, that too is a personal choice where some grind to get a really low slope and some, like I do, just give it a light brush across the foot with sandpaper to give a little bite to aid the thread climbing. I don't like to take the finish off the guide feet unless it's necessary, and most of the time with Fuji guides, it is not necessary. I've been accused of being almost "sacriligeous" of the "unwritten builders' code" by not grinding to a low slope. Your rod, your process, your choice. Obviously, the rod will fish the same regardless of what you do.