Aside from the cost of the project, also consider the following:
- most residents won't use it
- many who use it have a free/ subsidized rate
- the fees collected on a fare pay for a fraction of LTD's overall operating costs
- it's still just a bus which, right or wrong, has a lousy stereotype to overcome if it's going to entice more riders 
- bus service is not efficient unless you live very close to one of the stops
- had this $100 million been allocated to every person living in Eugene, it would have been enough to buy a nice (~$600),  energy efficient bicycle which utilizes existing infrastructure, produces zero emissions, and has little maintenance/ overhead costs. Of course, since not everyone can ride, perhaps allocated funds could be used to call a pedicab, taxi, or uber driver.
- many along the route opposed it
- it will never go away

What is there to like again?