Additional ending (spoilers)

I quite enjoyed this flick but felt it should have never of ended the way it did. They could’ve added an extra 20 minutes or so to give it the not so happy ending which In my opinion would of made much more sense. When they were administering the toxin to the aliens and the others woke up I thought ohh this is how indirectly they started the outbreak. If one of them had escaped it would make sense that Dan Forester would of felt guilty that he was the cause of the outbreak and ultimately his daughters death. Hence why he felt he couldn’t be around his daughter and the sequence of events played out as was described by Muri. And in turn repeating his fathers actions. It would of kept the nature of no-matter what you do on the past it will create the future. I thought that was what they were intending and to me would have been more fitting then the happy ending that we were given.