Arreaz doesn’t walk much or hit with power. With exception of last season. Seems they are buying high. And need pitching. They’re 20 in MLB team ERA. Just seems delusional that they can compete for the West.
Arraez is a poor man's Tony Gwynn, which is still really good. In the past three seasons he's posted wRC+'s of 131, 132, and 109 (this season).
I admittedly don't know anything about what the Padres gave up though.