I couldn't disagree more with the tonal properties you describe.Maple is a closed grain, hard wood light in color. Often finished to prevent wear and discoloration. The sound is bright, more pronounced low and high range. Very clear notes. Fast playing feel.
Rosewood is a pourous,oily hard wood. Can vary from reddish hues to dark chocolate in color. The sound has more midrange, the tone is rounder, adds slight overtones to the end of a note, like a ride cymbal on a drum set. Slower playing feel, digs into the note more.
Ebony is an oily, closed pore, hard wood. Varies in color from black to tan, sometimes streaked together. The sound is warmer than maple, more balanced in the highs,mids,and lows. Clear notes and chords with a slight rounding off of the tone. Fastest playing feel of the three and my personal favorite.
Maple is the softest wood among the 3, and therefore most often the mellowest sounding.
Ebony is by far the hardest wood of the group producing brighter tones.
There's a reason Gibson uses rosewood and ebony almost exclusively on just about everything they build. The shorter scale length has less string tension, and a much more slack tone than the 25 1/2" scale. Harder woods work great with humbuckers on shorter scales.