I know as much about football management as any of the other armchair experts on here, but for what it's worth I think my first eleven would be this:-
Cornell
Caprice McAusland Goodwin Grainger
McGregor
Newton McLean
Teale McGowan
Thommo
I think McGregor could really do a job protecting the back four - he's a bit quicker than Goodwin and more likely to look to pass the ball forward once he gets it. As far as I know, this is a role he often played before coming to Saints. He would bring much-needed solidity to the midfield and give Newton and McLean a base to build on. It's difficult to accommodate both McLean and McGinn, but I think McLean is the more effective through the middle and more likely to offer Thommo real support so I'd start with him. It's not ideal to have McGowan on the left, but he can beat a man and might be able to provide a creative spark from that side, not necessarily as a winger but by cutting in and causing problems that way. I think he is too easily crowded out as a central AM and too far from the front line when he's played as a deep-lying playmaker.
McGinn would be my choice to replace Newton, McLean or McGowan. Harkins would be an option instead of McGowan, or as a secondary striker. Bahoken would be Thommo's understudy, or a second striker.
Alternative eleven:-
Cornell
Van Zanten McAusland Mair Grainger
McGregor
McGinn
Caprice Harkins
Bahoken
Thomson
I've clutched at a few straws with these selections because, to be honest, I think the main issues are lack of movement, slack passing, lightweight midfield, poor communication, lack of clear purpose and an absence of dig and bottle and I'm not sure moving some of the players about a bit can sort that.