Originally Posted by RachelBlackG

High DA/PA isn't everything. It's just part of the puzzle. I have site with such values and it is definitely not SEO valuable.

- I think that Google just gave away SERP bonus for your new site (occurs for new sites only).
- You may lose some positions due to the change of focus keywords. on your pages
- Google may recognize it as unatural when you gain strong links so early (check your link profile).
- Also depends how fast did you add new content and how. If you add it automatically, it can generate better traffic from the beginning, but when Google recognize it, it will start slowly lowering your positions until it reaches some bottom.
- Young sites with no history are just more unstable and may rise/drop in certain countries a lot. Add international targeting in webmaster tools (preferred country for your target audience).

These are just things that come up to my mind at this moment from my experience. Hope it helps a bit.