The other important skill rabbis need is public speaking.
I have heard rav’s with the Torah but not the ability to protray that torah to an audience.
I realize many Charedim dont really care how the Godol speaks and is just happy to be there, but it is really important to know how to speak in front of people.
I have heard Gedolim speak and they speak softly in monotone and many times in Yiddish (To an audience that likely speaks english) and they also speak in code and it takes someone to explain to you what they really mean.
Alot more can be protrayed if a speaker speaks in differnt tones, speaking clear and consice english (assuming a mostly english speaking crowd) and let everyone understand what they are saying.