Waiver Wire Value - Who to Pick, Who to Drop?

Hey guys I could use some help with waiver wire value before you hit week 1 and you'll never get them again.

I currently have Calvin Johnson, Edelman, and Kendall Wright as my starting WRs.

On the bench I have Wes Welker, Kenny Stills, and Tavon Austin.

Also have Rudolph and Gates as my tight ends.

Two guys I would like to pick up are:

Marqise Lee - He's a rookie, and I never draft rookie WRs because it takes them the whole year to learn the playbook. It may be a bad sample cuz he'll prob get an unusual amount of targets today with Shorts out and playing Philly.

Denarius Moore - I've always liked this guy. Had a great end to the regular season. Had a great preseason with Carr at QB. Only issue is that there are so many mouths to feed in that offense.  You're competing with Jones, Streater, and Holmes for targets with a rookie QB. If McGloin can get Moore his catches though, I'm pretty sure Carr can too.

Stills is in a prolific offense that just lost Lance Moore and Sproles, but he's more of a deep target. Didn't really get more than 5 targets a game last season, and he's already hurt.

Gates is old and is game-time decision already for week 1. Green is suppose to be his heir, but Gates got all the playing time in the preseason and played well.

I'm not dropping Tavon Austin. Think there's too much value there.

So who should I pick up and who should I drop?

Id be willing to drop Tavon if he gets a dud today.

Oakland is playing the Jets with a low high/low so no one is going to break out today.

Maybe I can wait on Denarius Moore. None of these guys would be immediate starters for my team, but I do need depth. I only have 3 RBs, and 3 startable WRs for the first 4 weeks of the season.