After watching the first 4-5 double episodes I was thinking that Angel's Last Mission: Love is just a cheap imitation of Goblin. Many of the major themes in the show are essentially the same (reapers & angels are kind of the same too), which isn't bad, but the execution is worlds apart. I mean sure Shin Hye Sun's acting performance was out of this world good, but that was it. I was skipping scenes featuring sponsor board meetings(?) and I did not like all the stupid scheming and the asshole second lead character. I felt that L had the same acting teacher as Jinyoung and I don't mean that as a compliment. Many reviewers did not like the second part of the show, but to me the second half saved it. They've dialed down on the stupid Chaebol corporate bullshit and instead of meaningless scheming we proceeded with murder attempts that were a lot more interesting really. Also the second lead had much less screen time, which was a huge bonus. Even L's acting has improved, I felt genuinely touched at certain scenes. It was good romance, not much of a comedy though in the second half. At times I was even sitting at the edge of my seat.

Sure the last 5 minutes did not make any sense, it is the same ending as Goblin's, but the context is different. "The Deity is cruel" should've been the main theme of the show, it makes very little sense that the Deity would change his mind like that, then again I'm a sucker for happy endings & a sloppy happy ending like this is still better than tragedy with the conclusion that love is not eternal, the person that survived should move on & forget everything.
(If I were the writer I would have went with exAngel asshole guy sacrificing himself to keep the balance for a more reasonable happy ending.. :P)

The OST does not have too many tracks, but 2-3 of them were really memorable. It's way way above average.
The cinematography was good, though the cinematographer really likes the composition form called "the tilt".

TLDR: Out of all the 50+ kdramas I've watched this is the most similar to Goblin, it's nowhere near on the same level, but it's well deserving of a watch & perhaps a rewatch .. (Shin Hye Sun should get an award..)