Yep. If you want to be a big team and challenging for numerous trophies then you need a big squad.
As we witnessed, Mings, Ramsey & Buendia... followed by Moreno were all sidelined for a lengthy period of time.
The squad we have has done wonderful so far in where we're at in both the league and UECL, but we won't be able to keep this up all season, burnout will soon catch up once we enter into the FA Cup too.
As for Baena, he would fit perfectly on that left side of the attack. Adding more numbers in January is needed and this lad certainly fits into how we play under the Emery way.