One of the knife makers here might be able to give us a definitive answer, but I have a couple of “skeleton” full tang knives that use paracord for the handle material, so personally I wouldn’t see a “full tang” as being in any way dependent on the attachment of the scales - I’ve always thought it was more about the blade material extending through the full length of the handle.
The Switchblade scales are certainly very grippy, though conversely I found them too much so, hence I had
@Danum replace them on mine with Micarta, which I find works much better in the field.
All goes to show that knives are a very personal thing - you have to work out what really works best for you. It’s a lot of fun working your way through the “maybes” though