Actually, he was at 90 POS+ in 2022, not 82. So three years at 90 to 95. I wouldn't call that bad for a backup. He's also 82 for 101 in stolen base attempts in those three years.
He wasn't brought here to be the starting LF. If he is starting there, it's because Rojas was sent down, and the alternatives (Cave, Pache, Dahl) are worse hitters. I still maintain he will not see much time in the infield unless there's an injury.
I really can't understand why people have a problem with Merrifield being on the team. Even with him here, there is a weaker spot on the bench. He's not blocking anybody important. He's old, but he's on a one year contract. I don't get why his salary matters; it isn't preventing the Phillies from improving the team further. If people really think that his brand name dictates he will play a lot more than he deserves, then they are just assuming the Phillies will mismanage the team, which is a different problem that isn't caused by Merrifield's presence.