Newsflash, Vidal has been our best in overall considering the last 4 years in total, he was mediocre last season, due to messed up injury making him play half the player he was for the first awful half of the season. But he went back to his usual level defensively february and onwards (offensively would take a bit more to get groove back), and had basically top level International performance that culminated in a title due to his efforts.
And dfuh he is obviously the engine of the team, kind of effort and box to box effortlessly top class player he has been for a long time doesnt just go away over night. Did you want to sell him before it even became a hint of a news that it was happening? If you say yes, then you have a point for saying stuff like the above, but if no, then you are just adjusting to seeing the positive in it just because it happend, not because its something you wished for, anyone who did its ludicrous really.