Due to nature of the game you can't have enough in your squad.
There will be a couple recovering from winter operations always is.
Then there will be a couple injured in the friendlies , hope not but generally all teams do .So while squad looks good on paper now , it probably be diluted a bit come February

Luckily we have a squad capable of coping with that scenario.

I agree.
And also the salary cap means you can't just have an unlimited squad.

Another happy problem with a large but quality squad is player want gametime. Some pretty good players will be sat in stands next year and the more players you sign make it even more so, it's a balance. Ste Mills said we are pretty much done, but also said any team that say they are completely done is lying! Personally I think player can drop out of favour pretty quick so if for example if Kruise Leeming doesn't like fact he isn't the chosen starter for Wigan and we have cap money we can swoop in!