Arizona is a bottom spending team.
The math tells me which I would want to own. Yandle ($5.2M) is UFA in 2016-17 and could get moved in the next 2 years. OEL ($5.5) is locked in until 2019-20
Yandle will get some big money in FA and it might be a money grab, that doesn't always mean a better position team scoring wise. Although there isn't too many places worse than AZ.
Yandle gets very favorable deployment as far as Zone starts. If he was to go down just in zone starts and goes up against some tougher competition that could result in less points. OEL has a better chance of keeping upward progress. When Yandle gets traded he will see an increase in points. OEL plays tougher minutes and points almost the same amount as Yandle, the difference is the PPP which will come soon.