Reading Arpon Basu's article on the interview and I thought Kostisyn was incorrect about 1 thing. 1) it's not more difficult to score on the 3rd/4th line (at even-strength) since you're facing weaker competition with the way Martin employs matchups. If you lose your powerplay time in addition to dropping out of the top-6 your scoring will suffer, but that's because of the powerplay time.
Overall I think it's minor. Martin trusts Kostitsyn on the ice - more often than not under Martin Kostitsyn has been matched up with Plekanec against the opposition top line. With Cole coming in that may come to an end but the easier matchups should mean that his even-strength scoring rate gets better.
Wouldn't be the off-season without a very minor controversy to talk about. If we're lucky Gauthier makes a trade and we can move on

.