Faculty retention takes money. ASU went even higher than that. But, tuition does not go to faculty salaries. The rationale behind that one is that it's the state's responsibility to pay university faculty because they're state employees. So, a tuition increase above the necessary rate of inflation plus one wouldn't help with this problem.
Someone has to pay for that.
Maintenance, upkeep and the usual expenditures should be covered by a modest increase keeping with inflation. In this state, universities need to grab every penny they can get, but if they don't have a plan for our pennies, then we have better things to do with them. We don't want a tuition increase if the university doesn't need it.