I like my Mares Avanti Quattro Power full-foot fins a lot, but don't get to use them very much, except for local diving when the water temp is warm. They are too long and heavy for my airline luggage, and do not keep my feet as warm as 5mm booties and open heel fins. Also, when I wear booties with open heel fins, I have something on my feet for traction on the boat after I remove my fins.
I can't use booties with my full-foot fins, but I can use neoprene bootie socks. They are harder to get on and off with the socks, but I can make it work OK. You might be able to use a soft sole, flexible booty as long as you buy a full-foot fin that has a foot pocket large enough to accommodate the booty. I personally do not care for that setup, but you may like it.
Additionally, the only time I ever got a bad leg cramp was when I used my full-foot fins. There is more weight forward of the foot so the center of gravity is different than on open heel fins. There are pros an cons, but the choice is very personal. That is why I have both designs.