I loved this. Adored it. To the point that I was hearing the actors in my head, with the sound effects and Arrow music and everything, and had a grin plastered on my face.
See, Arrow has always had a problem with being what it wants to be, versus knowing how to get there (Just like its protagonist!). Season 1 was a godawful CW-drama-mess, season 2 is The Best Season, but it requires knowledge of the first season thanks to the flashback conceit, season 3 was too ambitious for the budget and the writing team, and this current season is goofy. There are always spikes in quality. Then there are dips.
This collection is aptly titled '2.5'.
It's got the same tone as The Best Season, it's got the plot elements that made that season so enjoyable (the pared-down cast, the seriousness of the threats), and at the same time, it ends having connected us to season 3's events quite seamlessly. Without flashbacks, the audience can chug along without remembering exact details of the previous season. Without the goofiness of the current season, Oliver can grow and develop with an actual sense of progression. We have Roy as Oliver's sidekick, and we have Olicity elements, but they're not yet the needless tumors they'd become. There is still the season 2 continuity lockout, and even Felicity mentions that they act more like coworkers than a team (something this season actually got right). But even then, the continuity lockout is the most minimal it's ever been in the Arrowverse.
There's also no budget, because this is a comic. This is amazing. We get literally every face worth wanting (see: Sara Lance and Nyssa, Malcolm Merlyn, Ra's Al Ghul, and even a Suicide Squad story), plus action sequences that are impossible to do on a show's budget.
So, this graphic novel collection of one novella and two vignettes is, hilariously enough, a strong contender for the best "season" of a comic-book-based show. In the same way the Marvel Star Wars comic is the best way to do an interquel short of having Mark Hamill act the thing out for you, this is the best season that doesn't have Stephen Amell punching folks on your TV screen.