Just like with the other games, there is a limit to the number of friends as squad members that you can have. For ZS it is 500.
I'm one of the ones that thinks its fine as t is but, increasing it to 30 would at least make room for the 5 strikers and 5 defenders while still allowing you to have 20 friends. I feel bad having to pick only my 10 strongest friends. I hate having to have tons and tons of "friends"I don't even know just to play a game but 30 shouldn't be too hard..anyone that's serous enough about this game to go past level 500 ought to have at least 30 squad....of course raising to 30 would just lead to people clamoring for 40 and then 50 and then it would turn into the 2000 pirates which is ridiculous at 25 UN per item 30 for a vehicle....and I agree using only 20 items is a downer liek when I fought the basketball zombie and looted 500 basketballs in one fight