I think my biggest issue with KP swaps would be waiting for swappers when my bar is full. On day 2 of the tournament, I clear 1-30, sometimes 1-40 which is over 100 KP.
If no one is online to set up a special swap, then what?
Carry on and if no one is online then it is no hardship to pump one of you own aw's. I still find it is the best for multiple time zone fellowships.
Also if available pump the tech tree with kp.
Also I keep in mind to buy 3-4 kp a day and sometimes use them to fill a swap placed using excess coins. if I don't have all the kp required.
That system is how we stick to just the 4 basic, 5,10,15 and 20. The 3kp earned, I buy 2 using gold to make 5 for an example.. Not buying is a waste in my opinion and now 1kp costs me 1.4 million but my MH capacity is 38 million.
No one in my fellowship loses and we all gain daily.
As for the special swap the 30kp doesn't go anywhere, it remains in the inventory indefinitely, and advice is when it is quiet in the middle of the night for most, a member from the other side of the world post on the 10kp and 20kp if both by the same player, or any combination, 15,10,5 etc then use it.