Probably a matter of taste, but I find the implementation on the D-274 really helpful. Some of the real instruments are still very expressive and powerful on a single string. Horowitz by the way advocated for its use to help colour louder sections, and this explains his hallmark crashing fortissimo when he finally lets it off.
I definitely don't oppose the possibility of even greater realism. Just wanted to say I use it a lot and appreciate the general way it is balanced. (I'm worried if it simply gets muffled I'll hardly use it any more)