But astute #AskAgent participant pointed out something else: It's hard to incorporate advice when all the beta readers say different things.
This is true! And agents face this all the time, too. When subbing a client's book to editors, we frequently get completely conflicting feedback from the different editors: I LOVED the worldbuilding! The worldbuilding just wasn't there...what do you believe?
The truth is it's good when everyone is saying different things. It means that there's nothing glaring that you're missing. And, if all of the feedback is generally very positive, it means the book is probably pretty ready to go.
Beware, though, that you don't try to make consistent feedback into divergent feedback. If all of the critiques coming back are character related (the voice isn't right, they feel flat, they annoy me, she doesn't feel real--all technically "different things"), it means that character is NOT working. It might mean it's up to you to put your finger on exactly why, but your Betas are telling you something useful.
Look for trends in your beta feedback in the following major areas: