you can see i'm a long time forum member and i have contact with many players inside and outside the forum. so i'm very sure to have at least an idea of what many people think about the game. if you follow the forums you will also get a sense of what many people think.
so far the tendency is pretty obvious for me, PI is not overpowerd but it slows down the game in a relevant way. this relates with one of the main concerns for many months --> the game itself is too time consuming since pvp was released, and everything that extends the playing time is a big issue as you can read in almost every "goodbye troopers" thread. so puzzeling all together leads to a obvious conclusion: --> we need something to speed the game up and PI is exactly the opposite of this.
in a vacuum PI wouldn't be such a problem itself but if you try to see the whole picture it's one thing that makes the game more boring and repetitive. just to wait two more turns to kill the last enemy because pharaoh casted invincibility for eda is ridiculous.