Vladdy is fine. He's getting unlucky. He has a 70.6% HardHit% according to Statcast with an xSLG of .574, xwOBA of .420, and average EV of 98.5.
Springer is also fine. He's getting BABIP'd a bit.
Bichette has been terrible, but he has the track record to suggest we shouldn't be concerned. April has been by far the worst month in his career. He's a slow starter.
IKF and his -1.4 launch angle is a bit concerning. Worms would be in danger if he was hitting the ball harder.
Varsho's start is concerning. If you average his LA and IKF's launch angle, we'd be getting somewhere.
Kirk's start is very concerning. Thankfully, Jansen should be back soon.
Kiermaier is actually making some decent contact, but it's all on the ground. Less concerned about him.