Ernie's information probably comes from the company; I know for a fact that I have heard that exact same thing from Rich Hamilton when testing, as well as when providing guidelines for designing scenarios (not as a hobby).
The issue is that the engines were not ever designed for the scope that they can portray - that is something that the Scenario Designers pushed things to. It can do some things well, but as a scenario designer you have to set things up towards it's strong suit. One of which is definitely not water crossing scenarios

don't ask - but it is what it is... as a designer you have to work around that sort of thing.
Another can be selecting the proper formation (and if you have more formations to choose from - then ... well you can have more problems from one engine to another. ).
Personally I think they push them pretty well -or put another way, I get jack for having clubs listed on the SDC site -and if I didn't feel like I owed it to Rich -I would dump that area in the blink of an eye without a second thought. I think the entire 'secret squirrel' our side's tactics need to be protected ... etc does nothing at all for game play and is a layer of competitiveness that is not really all that topically conducive to covering the titles.
Or put another way -when in a club a person would cop faecal matter when writing up comparative strategies for all sides in a scenario -so my own opinion is, say if a lot of guys are not PBEM - and talking about the entire topic -and play, strategies, objectives and all that is not taken on as a whole - then it follows that I have no idea why a person, maybe not into PBEM would look for a club, because they might not see that a club has anything to offer them. Something to think about, but I don't actually claim to know the answer.