The findings could be misinterpreted.
We need to wait for the results of a wider and more detailed report
It leaves important questions unanswered.
Much of the evidence is inconclusive.
The figures are open to other interpretations.
Certain findings are contradictory.
Some of the main conclusions have been questioned. (If they haven't, question them yourself; then they have)
Not really a basis for long term decisions
Not sufficient information on which to base a valid assessment
No reason for any fundamental rethink of existing policy
Broadly speaking, it endorses current practice
They is harbouring a grudge against the public service.
(With apologies to Sir H)