The reason for this in the higher levels is that Quality seems to win over Quantity, we would rather have a 17 man 6-7*squad with overall Quality of 218.7 than a 22 man squad mixed of 5-6-7* with an overall Quality of 215, it is too costly to maintain a full 22man squad[/QUOTE]
It is better to have 5* reserve than to be without it at all. I've had for few seasons 6-7* team and I know how hard it is when such player is useless in any way; mine case was bad form of some high quallity players which forced me to use 5* reserves in 1st squad.