My opinion in No and why I came to that
1) what 'll happens with new players that wanna start PvP and have to face a legendary poke with iv s over 25+?
2) you 'll destroy the feeling of catching a good legendary one (I have a terrible legendary)
3) you 'll be no fair for others who need nature reroll!!! Why you can reroll iv s and no nature too?
PS.
I know that you want to make PvP coins valuable again but this isn't the good way .