Couple of things from what you say mate...
Personally, I will be sad to see Clarke go. There is no doubt in my mind that he's not been 100% fit for us, and as you say he's heading that way now. I said it before, but I think if he works hard thru the summer he could prove a quality player in the Championship next year. He has a great first touch and a good footballing brain. I certainly wouldn't complain if he somehow ended up here next season.
As for Taylor, he's had that problem a few times... he's young lad and he needs experiance before he will learn how to be more influencial... I've said it about several games recently that teams now know how we play and they constrict the middle which takes Lidds out of the game, because no matter how good his passes are he doesn't get the ball, it also take Taylor out of the game - as he hasn't yet learnt how to remain influencial, and it also negates our biggest threat in Wellens by crowding him out. I was happy to hear Shez make the change of Glombard, because his pace and direct play forces teams to pick him up and to chase him and that opens the middle up again and when teams are getting ontop it speads them thinner and gives you a counter attacking option.
Finally, Porter... I think it's just a Keep the Faith thing... he is undoubtedly talented, fantastic first touch, fantastic eye for goal, good work ethic and I think he still has it in him to get 10 goals before the end of the year!
Onwards and Upwards!