The "style" of the engine, with square-ish case and head is similar to the older OS engines. It is a lot like the OS CV series. Probably a lot of car and some heli lineage designed in. The square case provides material for the bypasses. Note how the exhaust port in the sleeve isn't really centered on the side of the engine, it is back at more of a 45 degree position. And once you have a square case you might as well put a square head on it.
I don't really see an issue with the extra webs and gussets. It is a very good thing to have a case that is dimensionally stable. Sort of the opposite of the Fox .35 Stunt....
And, having bounced more than a few control line engines off the pavement, I can say that it isn't just "R/C noobs" that do it. I most recently bounced a Nagmum Bloohead during a "takeoff situation" in a scale racing plane. The head was mangled and the plane was headed for some major surgery, but the engine still runs fine. The case survived and is still racing...gussets, webs and all.
Dave
PS--I think the nitro levels quoted in the engine spec sheet is pretty typical for heli engines. Lots of power to weight, right? But I suspect the .37 would run fine on 5-10% with no changes. I'll have to go back and see if Fred stated what he was using. (ok, he said he was running 5/22)