Other than that fluky '09 season, which can probably be attributed to luck (.275 babip), he has been extremely hittable. In the last four seasons only 24 pitchers have had a H/9 higher than 10.5 (min. 162 IP), Millwood and Livan Hernandez have done it three times, nobody else has done it twice.
Innings eater and veteran presence are labels thrown around that mean precious little to me. I mean look, if he's going to put up an ERA+ under 90 wouldn't you want him to pitch as little as possible? Low quality innings aren't suddenly transformed into something wonderful just because there are a lot of them. As for tutoring the younger pitchers, is he supposed to say "See how bad I was today? Don't do that."? Being vocal is fine and all but if a guy is continually getting bombed I gotta think any message he delivers isn't going to land.
Millwood's last best chance for any sort of success most likely rests in the National League, where 11% of batting orders consists of hitters that either bunt or strike out. I hope he realizes this and turns down what I'm sure will be a far too generous Royals offer.