No the strong opinion is fine, but I just don't think UFA is a viable options.
As for EK, you'd be paying for what he was rather than what he will be, which is still really good at this point in time but hes got a ton of miles on him. I think he'll age fine, but there is a dip in production coming (I don't look at this year as a good example, hes been pretty good since December.) Not to mention hes missed more time with injuries this year than I'd like.
but same with Panarin, do you really feel comfortable banking on them being at the same level 4 years from now? Not to mention how adding one of those guys likely interferes with this teams best chance at landing a home grown, cost (and term) controlled difference maker?
To me, thats putting the cart ahead of the horse. Plucking a guy who fits with the time line away from a team who can't afford them seems like a much more likely scenario to me.