Massive massive pros: daily save backups. no wipe/corruption/population loss when updates are released. Can also save configuration profiles so you can easily switch between different play modes (purge/not purge, whatever). And, there are settings for individual dino stats, which console doesn't have.
Cons: yeah, the oversaturation and join problems, but those issues will go away. Broadcasting is broke, but that will also be fixed. I liked that I could see WHO was on my old dedi, nitrado just shows how many people are on.