Is there any point to the limited uses per day of Phantom Steed abilities? Can't you just summon a new one when the first's abilities run out?

Phantom Steed and Detect Magic aren't on the table.

Unlike the rest of the abilities in the class, Swift Steed does not indicate the level it is gained at (3rd) in the text.

Looks interesting. I'm particularly looking forward to seeing new invocations (they're always fun).