Left joycon repair update for those that are currently, or in the future might be going through the same thing.
Bought the Switch Friday afternoon 4/28.
Called Nintendo Saturday 4/29. Was told transit and repair would take up to 3 weeks. I very politely voiced my disappointment that I hadn't had the product for 24 hours yet and it already wasn't working. Also mentioned that the whole reason I purchased it was for a trip I have on 5/13. Employee told me that she would issue an express shipping label and try to get the repair expedited. A few hours later I received a 2nd day air shipping label via email. Unfortunately UPS was closed by this time and they aren't open on Sunday.
Monday 5/1 I dropped my joycon at UPS.
Wednesday 5/3 received an email stating the joycon was received and is currently "in service" (being repaired). Checked the status through Nintendo's website and it shows 'In Service' as well as a note that says 'We are preparing your item(s) for shipping'.