That doesn't matter what Eichel wants or doesn't want. He wants out of the shitstorm in Buffalo and I bet would look on an up and coming team like Ottawa quite favourably. Again though, it doesn't matter what he wants, it matters what Ottawa is prepared to offer. So...I stand by the zero percent chance there.
Krejci is at the tail end of his illustrious career and has played for a contender for the last decade. Pretty much the last places he wants to play are: Ottawa, Detroit, Buffalo, Arizona, San Jose. The flip side is, if Ottawa offers him 14 or 15 million on his next contract he might consider it, but I all but guarantee a Minnesota style playoff likely team (or Boston).