The fact of the matter is

[Spectre]

The terminology that the OP is misusing is actually clouding his statement, but as far at the server-client communication goes, I agree that it seems bloated.

The actual engine of the MMO contains way to many components to just say "needs to be overhauled". Pick which parts of the engine (if it is even things that are included in the engine) you think need attention, and you will likely get more positive attention from the people that matter.

From what I can tell, the thing you have the biggest beef with is the client interface and service side verification.

So, again, if you are saying that their server-client interface needs work, I completely agree, but calling for an entire "engine" overhaul is more than likely to get you ignored then to add attention to a problem, even moreso when the parts you have problems with aren't even functions of the actual engine being used.

http://en.wikipedia.org/wiki/Game_engine
http://en.wikipedia.org/wiki/Crystal_Tools