The phrase is often used in a neutral context; it doesn’t suggest any approval or disapproval of the division. The committee was split on the policy changes.
Pro Tip 2/3
Indecision Implied
Using 'split on' can imply that the group has not yet reached a consensus or definitive decision. The board is still split on the new initiative.
Pro Tip 3/3
Equal Division
Sometimes 'split on' suggests a roughly equal division in opinions or choices. The jury was evenly split on the verdict.