at this point of the game it is better to not legacy at all, you will see a lot of people creating alt accounts because of the way the match making is now, truth is that if you do not legacy you will be playing againts noobs, if you legacy you will be playing with more experienced players.
I dont always play, but when I do. I play for hours.
But in 2nd lecagy huh which negative boosters will you earn?
To be perfectly honest does it really matter? It's not like they help you.
If I remember correctly,
Fewer Grenades, No Power Weapons, Invalid, and one other which I forget.