Here goes;
1. A CBs role is more than just stopping goals, they also play a support role for the midfield and (in some roles) starts attacking moves from the back. You can say, to a point, that a keeper does the same, but in my opinion, its not the keepers job to start attacks, its just a plus if he does. A keepers only job is to prevent the ball from hitting the net, and starting play without giving it away to the oposition. Kante's role obviously consists of more than stopping goals, which is where they differ
2. Its was a total black and white-statement, and we both know Pickford isnt responsible for all the goals we let in since he joined us, but my point still stands. Other keepers also have to deal with bad defending in front of them, yet they have better clean sheet ratios. I know its unfair to compare him to himself at Sunderland, as he was a younger player then, but he let in howlers for them too. I remember us playing them before we brought him, and we scored a couple of easy goals that day, if I recall correctly. My point wasnt that Pickford is responsible for all those goals, it was a way to point out how unresonable it is to claim him as one of the best in the world, and then blame everyone else if things go bad. At times its the CBs fault, at times its the FBs but at times its Pickford too, yet he get a free pass because he's Englands nr 1(Didnt you see those saves during the WC!?!!).
3. Some of our fans claim him to be world class and one of the best keepers in the world. I guess thats what they want him to be, but Ive not seen anything to prove he's there already.
Im not a coach and wont claim I know how to improve him, but Ill make an example from last season. I dont remember who we played, but we got hit on the counter and it ended in a 1 v 1 with Pickford. Insted of pushing the attacker, he just stood on his line and let him score without really doing anything. Then, a couple of games later, we got hit on the counter again, basicly same situation. This time, Jordan reacted instantly, ran out and cleared the ball. It was obvious that Allardyce and his coaches had drilled him since that previous game, and I dont remember him making a blunder like that leading to goal since. Thats him improving a part of his game I think any first team keeper in the prem need to have on point, and I honestly rate him higher now than i did before I saw that improvement. I think little composure things like that would help a lot. It might come with age, but until its drilled, we should get a similar or better quality keeper he can compeate with. It would for sure be healthy for the whole squad, and it would put less pressure on Pickford.
4. I dont think we are an average team, I think we have a good squad. There are highs and lows in our team, but we do have some really good players.
Im running a little short of time here, so nr 4 and better/worse than Pickford list is going to be limited. I dont have time to proofread this either. :--(
Better than Pickford(not ranked):
Ederson
Kepa
Cech
Lloris
Patricio
De Gea
Worse:
Begovic
Schmeichel
Hart
McCarthy
Unsure:
All the others you mentioned.