Only a couple of those players you mention were regular first team members, unlike today. (justarsenal.com)
Bellerin is finally a structural first team member, and I feel like he should start against the weaker sides in the league and cup matches. (justarsenal.com)
In fact in the Europa, Wenger only played his second string side up until this recent tie against AC Milan, and in the League Cup he only played mostly first team members in the semis and the Final. (justarsenal.com)