"Optional" rules

Örjan,

Since you started quoting on me, I actually dug out my rulebook. Lo and
behold, FT2 pg. 2 reads:

"...the various parts of the Advanced rules MAY be added, either all at once
or PIECEMEAL AS DESIRED. Pick and choose which of the Advanced rules
YOU wish to use -- they are ALL effectively OPTIONAL..." (emphasis
mine).

This, IMHO, implies that the game is designed to work regardless of which
optional rules one might choose to use or ignore. Jon, please correct me if
I'm wrong.

Now, I'm perfectly willing to discuss CORE RULES ONLY. But if you feel those
are inadequate, perhaps you'd be generous enough to share your view as to
which of the optional rules are not actually optional at all?