Thank you for the review/feedback.
I will probably not give the game subtitles. I have test my game again and I do in no way find it difficult to hear what is said. But I really recommend playing the game with headphones, because it makes it easier to hear the dialog, and in general do it make the game sound better.
Sadly it is often an issue to run UE4 games on a bit lower end hardware. I do really not believe it would be a problem for most players.
I know that IGN is known to get high scores to everything, but I highly doubts that this game would get much more then a score of 1-2. But thank you anyway.