This is really a poor imitation of the Super League. Of all 18 games, only 3 (I highlighted them) can be called top games and in addition, you can find 3-4 games that are of interest. The rest will be interesting only to fans of the playing clubs. In total, out of 18 games, only 6-7 are watchable - and this is with the optimistic assumption that the new format will not kill the irreconcilability of the confrontations, since this is the group stage and the value of the games is very low. The only improvement is three matchdays instead of two, but that could also be a problem as the Europa League and Conference League will have no spectators at all.
Seems you are so accustomed to watching the big teams of the famous leagues only but you may not know that some matches might even be more interesting than those you listed. If you watch Portugal match against Scotland yesterday, you will be surprised at how tough and captivating the match was even though no one would expect it will be that way. Scotland had an early lead that kept Portugal on their toe throughout the match and it only took the extraordinary effort of Cristiano Ronaldo to turn the match around and that was how they got the last minute goal that gave them the winning. So, there are many matches you did not mention that will be very interesting. Just try and watch highlights and to see some of the key moments of the various matches and you will know. Although, I will agree with you that Manchester City against Inter Milan and Atalanta against Arsenal are among the tough matches in the fixture.