That's a photo of spin, so no way to determine how much of the skew is related to the spin oscillations that normally occur. How does it sit during agitation? Or after braking when spin is stopped? (a bit of skew may occur then depending on aggressiveness of the braking)
A factor that could come into play on tub lean is if the wrong motor counterbalance spring is installed. There are three choices identified by a swipe of color (blue, green, or none) to match the stripe colors on the motor's label. Your service guy surely is aware of that.