I love brees and he would help to dominate your league as your starter. But it would hurt your depth at running back, even tho, Arian Foster will be a beast this year, addai does help to lessen the pain of losing sjax. I do believe you should take the deal, sjax i dont think will last all 16games with his back and having no other threat on his team to help him. Take the deal and look for a qb to pick up to play in brees's bye week
I personally like the trade. Most of the time when you get the best player in a trade you're good to go. IMO, Brees is better than SJax. If you can have the other owner sweeten the deal with a 3rd player so that you can do an even 3for3, I'd try to pry away another asset.
I would say go for it. You know what your getting with Brees, a bonafide top 3 fantasy QB. As for Addai, he quitely continues to put up good numbers. When ur in an offense that moves up and down the field like the colts, your bound to end up with TD's. Jackson on the other hand is in the opposite situation. I think the Rams scored a total of like 15 TD's last year, and with a rookie QB, dont expect that to change much. Add to that the injury worries, and heavy load hes carried the last few years, and i just feel Jackson could be on the verge of breaking down.
do it, you are getting the best player, basically a 3 for 2, that's usually good strategy. I am not convinced about Jax, think he has a suspect line, and unproven QB, and he is injury prone. Brees is huge upgrade over Ryan.