Hader has still been excellent even when factoring in this year's homerun issues. He has a 103:15 K/B ratio in 55.2 innings of work. Established elite relievers are still plenty valuable, keep in mind after his clusterf*** of an offseason following one of his worst seasons in his career, Craig Kimbrel still signed a 3/43 deal with a $16M vesting option for the fourth year. Barring an extended injury or a sharp decline in his ability from now until next offseason, Ken Giles is well on his way to get a lot of money.
Giles will likely go for no less than 3 years in the ballpark of $40-50M, and I could very well see him surpass that.