>This was like 2 or 3 sentences worth of good points sprinkled in between a bunch of stuff that I'm pretty sure isn't an actual problem for anyone. If anything, the things pointed out are issues for people trying to write code that manipulates protos generically, which is not what most people spend their time writing and is probably exactly the wrong thing to optimize.

Handling a serialization scheme "generically" is the "wrong thing to optimize"?

Sounds like the #1 thing anybody would want from it...