Like Tubby, I usually use Advanced Mode, but then, I tend to reread my posts, before submitting, to be sure I'm saying what I meant to say.
Somewhat like speaking directly with someone... words released, can't be recalled, so it's best to get it right the first time.
As for changing fonts and colors throughout my post... meh! Better to leave something to the imagination of the reader.
Besides, there are ample other reasons, MUCH more impactive to us all, to be less than pleased with our recent "upgrade".
Puts me in mind of going from XP to Vista.