You talk from yourself, but you forget the problem behind it. How many players are able to deal without temp health? 1-2% of the whole playerbase? This isn´t even about a new difficulty or anything else.
Temp health is broken af. A lot of ppl wouldn´t be able to play legend without it. Especially deeds benefit from it.
I´m pretty sure everybody can confirm, that lvl 20 is a gift from the goddess and this is really a run-saver if you don´t pay attention once.