Although I do not know if there is a direct answer to this question, I do have some ideas that might explain the general use of force powers in battle.
Very simply put, I believe the use of Force abilities to offensively attack an opponent brings the user closer to the dark side, and goes against the Jedi's ultimate goal of disarming or incapacitating the opponent.
At a very high level, force moves are generally very aggressive when directed at another being (force push/pull or telekinesis are popular in the movies.) The Sith actually use the force in nearly every fight in the movies (Ex. Force Lightning by Sidious, Force Choke by Vader, Force Push by Anakin/Dooku/Sidious). The Jedi actually use non-combative force powers in combat that may not get qualified as 'Force moves' in the movies, but utilize The Force the same and draw the same amount of focus by the user (Ex: Healing/Meditation/Speed etc.) First let's look at the movie examples (just prequels are enough to prove the point):
Qui-Gon/Obi-wan vs. Darth Maul - Force Leap and Force Telekinesis, and Qui-Gon uses Force Meditation during the fight.
Yoda/Anakin/Obi-Wan vs. Count Dooku - Anakin uses a Force Leap/Dash, Yoda makes use of Force Telekinesis.
Anakin/Obi-Wan vs. Count Dooku - Force Leaps to dodge
Anakin/Obi-Wan vs. Grievous - Force Telekinesis/Force Leaps
Obi-Wan vs. Grievous - Force Telekinesis/Force Leap
Mace Windu vs. Sidious/Anakin - Note that Mace's lightsaber form Vaapad is an adaptation of Juyo. See below for more on forms.
Yoda vs. Sidious - Most force moves used by a Jedi here. Force Deflection, Force Leap, Force Telekinesis.
Obi-Wan vs Vader - Force Leaps/Force Telekinesis. This is the most aggressive we see Obi-Wan with the force in the movies, possibly representing his emotional investment in Anakin as we see at the end of the battle (breaking the Jedi code of course).
The pattern here is that most of the Jedi Force uses are defensive in nature and used at times to either counter another opponent move or draw an object away or towards the Jedi.
Additionally, if you look at the saber forms of the Jedi, Juyo/Vaapad is the most aggressive of the saber form and requires a furious offense of attacks utilizing a large stream of force in addition to force attacks. This form was favored by many Sith and is the form that would gain the most from aggressive Force abilities in combat. Vaapad was similar and banned by the Jedi for its Force requirement leans in the direction of the dark side.
Lastly, I believe this there is some reference to this topic in the EU in the Heir to the Empire series.