I'm still not entirely sure how Adelaide shooting herself reset the timestream but yeah, probably better than giant dragons showing up!
It means the base exploded as it was supposed to, Adelaide died that day and didn't cause a butterfly effect and her granddaughter was still inspired to pilot the first warp ship later on.
So the fixed point in time stays intact.
The other difference in the timeline is that there are now two members of the expedition who are now alive who weren't previously, and that should have a significant change on the universe. I'd imagine that Adelaide's granddaughter possibly went into space to find the mysterious person who saved them, and then ask him why her grandmother killed herself in the end. I'd be somewhat curious to see how that played out, as I wonder what The Doctor would do when faced with that?