He played with him quite a bit during the 07-08 postseason, but you have to keep in mind that Helm was a regular in two straight postseasons before he played as a regular during the regular season. It seems like he's been on the team forever because of his impact and energy from those two long playoff runs, but Helm's first full regular season was 09-10.
And yeah I'm not saying that Helm has a pure playmaker's vision, but his speed and ability to carry and cycle the puck open up a lot of simple passing lanes for him. And IMO he knows how to find them. And if he's feeding the puck to Nyquist, Tatar, or Brunner rather than Eaves, Miller, and Abdelkader, that's going to increase his assist totals by a bit I have to imagine. Helm is a good at sustaining the puck in offensive zone. Surround him with guys that have skill and know how to find the back of the net and he can be successful in my mind. Personally, I'd rather have Helm on Datsyuk's wing than Abdelkader. Just because he's a better puck possession player and forechecker. But obviously he's going to be utilized as a center with Babcock, assuming he's healthy and playing.