The players "don't have a clue" is the biggest myth in football. They will be in regular contact with their agents. The agent will not be negotiating without knowledge of what the player wants. If the player wanted it sorted out quickly, it would have been done quickly. The player may not know the precise stage of negotiation, but make no mistake, the player will always have some idea of how far along the negotiations have gone.
The fact that Herrera is willing to enter the final 6 months of his contract and is free to talk to other clubs, suggest he is happy for his agent to carry on negotiating. He, as well as the agent, probably believes this gives them a stronger negotiating hand. But it also leads to some, admittedly small, risk that the club will eventually stop negotiating and he will have to find another club.
The tone in my original point, which I think you've missed, stems from the fact that Herrera is absolutely worshiped by fans for playing for the shirt. Yet this idea is not compatible with the fact that he is willing to risk leaving the club by trying to negotiate, through his agent, for more money. I'm not suggesting there is anything wrong with this but I find it interesting how this sort of issue was almost unheard of at our club under Fergie, except for Rooney. Even in that situation, there is an argument to be made that Fergie wanted Rooney gone because he saw the decline.
Nowadays, this endless negotiation, is happening for every player, at every club. The posturing does my head in because they are already paid huge amounts of money, and yet there remains an element of greed to want more. I do have an element of impatience because he is free to talk to other clubs and with his quality, there will be no shortage of suitors. What frustrates me is that in the end, we will probably cave into demands and pay him a wage which far exceeds his ability. This will perpetuate our very recent problem with contract renewals and inflated wages at our club.