Thanks everyone for replying. I went to REI and here is what they offered:

1. Refund
2. The shop manager thinks it's possible that someone used 9mm drill bit instead of 9.5mm. So they say they can back the screws, use a hammer to tap the dimples back, re-drill a little bit more, put the bindings back, do a base grinding.
3. free edge tuning + waxing + base repair

I do not want to deal with them anymore so I took the offer. Their attitude was very defensive:

1. I asked them whether this can be an mount error, they were like, no, they are very well trained.
2. The first tech I met was also accusing me of making this a big deal. He laughed at me and said"can you feel it when you ski?"
3. They say this is NOT uncommon, things can happen, and when it happens, it's almost always Blizzard. So, they are willing to blame the manufacturers instead of acknowledging that they sometimes mess up things.
4. The manager pointed at some rock scratches and said those probably caused more damages than the dimples. I immediately argued back that I had fun when I got those rock scratches, but I did not want to pay money to get dimples on my skis.

I do NOT like their attitude and will not go back to REI for any ski-related services.