S2 celebrates the kinship among the Rainbow taxi members. They are the core of the entire season. Its also where it shines brightest and helps you oversee the flaw and some holes in the story.

Where it pales to Season1:
Not as gritty. Season1 was drippling with suspense and often at the edge of your seat thriller. Season1 tiltering between black white and grey had this intensity that couldnt be reciprocated in Season2.

Where it's better in Season2:
Camaderie among the taxi driver members. Their rapport and always having each others back. Their loyalty and love is just really sweet.
The individual cases are much more fleshed out and the variety and scope of the cases were really good.

Highlights
The linking cases and big bad boss. The audacity of the moves Do Gi and the team makes. The subtle flirting between Do Gi and Go Eun. The cameo from Nam Goong Min and Kim So Yeon (very well used imo). The character of Oh Ha Jun who initially irked me and yet evoked sympathy later.

Issues
Some of the infiltration was orchestrated alittle too easily. It feels like you have to defy belief to just roll with it. And Do Gi's been protrayed like superhuman and Go eun a superhacker. There are also glaring plotholes here and there. Theres also alot of product placements that you and I may not care for.

Why I rate it higher than S1
The same reason why I tune in to watch. Ive formed an attachment to Taxi driver the series and its characters. Its almost like watching your child graduate from highschool and enter university. A new chapter, stronger kinship but different experience. S1 was alittle too gory and often I debated in dropping it as I couldnt agree with the punishment Do Gi belted out against the wrong doers. He almost seem like a grim reaper. Here S2 is a fairer vigilante. Most of their methods of punishment is less cruel, not as violent and non fatal.

S3 I pray they dont harm this series and the love I have for each of the cast. Plus it wouldnt feel the same if we are missing any of the core members.