With their current squad, it would actually be good enough if only to make it past the round of 16. But to play at a further stage, Arsenal certainly needs a sharper attack power than now. Arteta must really prepare for this. But I doubt Arsenal will get new players in the attack line in the winter transfer market this time. Because it is very rare for a club to let go of a great player in the middle of the season. Arteta might also have to think about making a better strategy from now on. Because I see that the strategy used by Arteta has not improved much from last season. I think he should be able to improvise more. Because the UCL is the biggest stage in football between clubs in Europe. So Arteta cannot waste this opportunity.
Mikel Arteta need to motivate more for Arsenal players have been absent for several years in Champion League, its first time get appearance Arsenal can manage well until qualify to 16 round. FC Porto is experienced teams who play in Champion League and current group standings success eliminated Shakhtar Donetsk and get second standings finish under Barcelona position on the first place. Arsenal have balance their performance not only focus in Champion League but also get pressure keep playing well in Premier League get opportunity in the tittle race with Liverpool and Manchester City.
Mikel Arteta have good scheme with Arsenal but have weakness with dominance by young players difficult for Arsenal how to win match exactly on under pressure, not only with good strategies but also Arsenal have winning mentality if want get bigger achievement in Champion League and Arteta won't loss great opportunity to win UCL tittle.