Too much effort and cost for a mostly unpredictable and capricious result.
Can you afford to gamble your business and make financial projections on this? Is it a professional level service? Can you risk your reputation with clients on an Adwords program like this over which you have little influence and much risk?
I'm thinking about what's next in advertising & marketing for ~$1M - 10M businesses since this is beginning to feel like using traditional print media. No metrics, high cost, little accountability.
She did say one thing that could be helpful: that in determine keyword status and account slowing, the system considers WORDS -- not just keywords in the AdWords sense, but the individual words.
Now whether this is correct, I don't know. Based on some of her other statements, I don't trust it. For example, she claimed that the $5 fee to un-slow an account was intended to keep advertisers from just clicking "resume" without fixing keywords but not to be punitive. She didn't really want to hear it when I said that $5 wasn't going to inhibit a $1000/day advertiser, yet IS punitive to a $5/day advertiser.
She also didn't want to address my question, which was why my account had been slowed only 12 hours after I'd delete all "underperforming" keywords and substituted others to try out. She had scripts she wanted to push (make your keywords more relevant, use the keyword tool ... anyone surprised?) and I had to keep insisting that she come back to my question. She even suggested that I try a keyword which I'd tried with highly negative results. So after I had to push so hard, I don't exactly trust her statements.
But back to the topic, this might yet have some truth. Look at not just the keywords (lines) but the words within the keywords.
Edward
I had turned content-targeting off, because I know it doesn't convert for my vertical. Just for fun, I duplicated campaigns 1) campaign with search only and 2) same keywords with content-targeting only.
Guess what, keywords in content-targeting campaigns WENT STRAIGHT TO NORMAL STATUS.
I love Google, but they've got to get someone on this. SO much revenue, on their side and mine, is being lost.