A: Why yes there are! We heard the feedback, and worked out some suggested guidelines for two players:
We created an addendum for the Jumanji Fluxx rules that you can print out to add to your game box.

By the time we made Mystery Fluxx, we already knew of the issue, so that section is included, but in case you missed it, it reads:

Two-Player Dangers: If there are only 2 players in the game, Dangers work a little differently. Until the “No More Extra Lives” card appears, you do not win by eliminating the other player. Instead, they may jump right back in as soon as they’ve discarded their hand and Keepers.

Dangers Aren’t Like Creepers: If you are familiar with Creepers (a type of card which appears in certain other versions of Fluxx), you might think Dangers must be played as soon as you draw them. This is not the case.

There is also info about Playing without Dangers.