700? You probably took that number from coinmarketcap. There are probably as much unlisted coins if not more.
Anyway, would help allot if people who already analyzed all of them share their thoughts.
No one it is going to waste its time to write a review for every single coin, at best there are 10 to 20 coins that are worth your time the others are just trash. Or you could write a review for the other 680 coins, something like, dont waste your time, would be an accurate review.