Serendipity
Explorer
Neither. Give me a second DMG with new rules variants and other optional stuff.
MM2. Only option.
PC options are perfectly doable through various supplements and/or campaign and/or race specific books.
Anything that wasn't important enough to make the PHB[1], quite obviously, does not need/is not important enough to be in a PHB.
The whole concept of serial PHBs brought on by...from what I can tell, the edition immediately prior to 5e...can die in the fire from whence it was surely created.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.