Not sure what you mean by "bevel edge" ricasso. I just had a look at the RM/Emberleaf knife and the edges of the ricasso are not bevelled....unless you are referring to the plunge line?
I am not sure that it is right to say that Ray likes them, hence they appear in all the related knives. There has been wide variation in the length of ricassos on RM knives, even from the same makers. Some Alan Wood versions have really short ones, and some have really long ones. The Emberleaf version is in the middle, longer than I would have, but not excessively long (like early A.Wright bushcraft knives). Back in 2003 when I was on a RM course, the instructors were very much against any sizeable ricasso on a bushcraft knife. It came up because I took a knife I had made modelled after a Ed Fowler design, which had a 3/4 inch ricasso and big brass guard.
I don't see any good reason to have much ricasso on a bushcraft knife. That Ed Fowler was great for some tasks, no way your hand would slip while skinning with that big guard, but it sucked for wood work.
What also makes a difference is the length of the plunge. If the blade has been ground with a platten with a soft radius, the total non-cutting blade length can get quite long. The same ricasso on a blade ground with a sharp plunge could be a very different beast to work with. There is also the matter of how the leading edge of the handle is angled. If the front of the handle angles out down the blade the hand can ride further forward, and a bit of ricasso doesn't matter. It is worth mentioning, if you run wood too close to the front of the handle, you can wind up with some impressive splinters driven into the web of hand between thumb and first finger.
As an example of both a sharp plunge, and a slightly angled handle, the Spyderco Bushcraft.