He seems cheerful enough on the field and appears to mix well with his teammates so Im not convinced that he's unhappy at the Wire.

Maybe he is doing what Shenton did to St Helens.

Has any Warrington player consistently performed to the best of their ability this season?

Hear he wants to go back to Cas . At least according to his old dear

Clarke - not really shown us the form we'd all hoped for and certainly not at the level of last year. Whether that's down to how we play / how he's told to play I'm not sure.

Sims - the man mountain image was overblown pre season. He's no Masoe, but he puts in a good stint.

Wheeler - a speculative signing that is worth a punt. He's been given a chance and it's up to him to prove he's worth a new contract. So far, he isn't in my book but that's partly because he's been injured and partly because he seems to be a 'utility back' whereas I think he needs to have a standard spot - probably in the halves

So that's our new signings. Not world beating.

But a lot of the other players have also underperformed.

Ratch - incredibly versitile, can play in most positions. Is playing well, but can't do it all on his own. Full back is best position, even though not a specialist.
Penny - very impressed with him this time round. Realizes it's his last chance and is grabbing it with both hands.
Atkins - done ok in fits and starts, but we need him to step up.
Bridge - not fully fit / played out of position. A cracking centre but not a half. Not at his best this season.
Monas - out of position and weight of captaincy is having an impact. Bridge/Monas is the best partenrship so need to keep that together.
O'Brien - plays well, not a complete half but a lot is expected of him, and he's not at that level yet (though he could be given time). Pivot is a key role and probably too much is on his shoulders. Kicking game is not good enough, and I don't think he organizes well enough. That needs a confident player (with a touch of arrogance). GOB is not arrogant.
Myler - ok - has been injured, but I really expect him to be a dominant force in the squad yet he isn't. He's a couple of years down the line from GOB so should take command and give direction. Time is running out. He's not the world beater we expected when we signed him. I really hope he can turn it around.
Hill - consistent and a real force - even though he's not an enforcer.
Higham - tries hard and has some good outings but also a few real cock ups. Probably his last year, but I don't subscribe to the 'bash Higham' brigade.
England - injured but I like the guy and he's really starting to step up.
Westwood - been good in patches (and against Wigan he was very good imo), but we need more.
Laithwaite - not a big guy and not in the Westwood mould. Playing Ok but we need more than that.
Harrison - a prop at 13. I prefer more of a ball playing 13. Struggling for form I'd say.
Currie - we're having to overplay him and it's having an impact on his form. Not sure if he's a centre or second row. Ideally he'd be used more spasmodically
Russell - thought he was a full back but he's behind Ratch. A winger ? Yes but there's a lot of competition. I'm comfortable with him interchanging betwen the two.
Toby King - great future prospect. Play him occassionally this year
George King - as above
Philbin - played well and impressive from the bench. Not the biggest but more than useful.
Dwyer - we need him back next year.
Riley - (I mention him because although he's with London, some seem to thing he's due to come back to us) - not SL level from what I've seen.

Added - Patton - impressed with what I saw. Just needs time. GOB has a challnge on his hands.

TS - a top class coach but not the best at signing players.
Agar - don't know enough about his influence other than whats' spouted here.

Bascially most of the squad are not performing consistently well and given that - as I write this - there is 1 point separating about 7 teams, we need that consistency otherwise we could be out of the eight, let alone the four.