While reversing the current policy of white wash first, investigate only when impossible to hide is a desirable goal I can see one problem. There is a small potential for getting soldiers hurt because of a reluctance to act when force is actually necessary. As Israeli actions in the last 30 years have destroyed it's credibility it will take such a change pursued for some years to change the world's perception.
Judge orders Jerusalem Gay Pride attacker to undergo psychiatric evaluation (Haaretz)
from the article: IDF to tighten policy of probes into civilian West Bank deaths