Also, historically, this isn't too far off from Nintendo's M.O.
Until E3 2006, the only announced Wii games were:
- The Legend of Zelda: Twilight Princess (port announced November 2005)
- Red Steel (announced April 2006)
- Metroid Prime 3: Corruption (announced May 2005)
- Super Smash Bros. Brawl (announced May 2005)
No gameplay videos from these were seen until May 2006, when a much larger launch, launch window, and first year library were announced. The Wii launched 5 months later.
We have less than what was shown that E3, but we have more than what was known before it. The Wii U and 3DS followed a similar reveal/release tempo. Switch is a little condensed but yeah, I see no evidence of a rushed or panicked launch. That said, I expect 100% of the Switch's first-party launch day lineup to be Wii U ports (with the Wii U version of Zelda coming later, Twilight Princess-style.)