Those advantages mean nothing when Sylveon has higher HP which offsets the Defense argument. Yes, Florges has a higher Special Attack, but only by a small margin, and Sylveon has Pixilate Hyper Voice, which has notably higher power than Moonblast. Florges does learn Aromatherapy, but Sylveon learns Heal Bell, so that point is moot as well. They both have small movepools, and Florges has no advantage movepool wise. All of those advantages are very small and are not enough to justify using Florges over Sylveon.
Anyways, this has been brought up before, but I want to suggest Krookodile to be added to B Rank. This gen just happens to be kind to Dark-types (see: Bisharp and Mandibuzz), and Krookodile is among the numerous Dark-types that have a niche in OU. Krookodile can do quite a bit of work both offensively and defensively thanks to a number of qualities. Firstly, Moxie is an amazing ability, and Ground / Dark coverage is very good. The Knock Off buff helps Krookodile a lot, which gives it a stronger Dark STAB to hit those who are weak to Dark fairly hard, along with the awesome effect of removing items. The Defense boost does help Krookodile a bit, so now it can actually survive weaker physical hits in the event that such is necessary. Krookodile's Speed isn't terrible, and it can overall perform pretty well as a great sweeper. Defensively, Krookodile performs decently there as well, since Intimidate is also a very good ability, and the defense buff along with the prominence of Ghosts like Aegislash allow Krookodile to go defensive in this meta. Taunt and Stealth Rock are both very good moves, which Krookodile can use well, and it can also beat most variants of Aegislash thanks to its passable bulk and typing. Earthquake off of a good 117 Attack also gives it a bit of offensive presence, so it's not a complete sitting duck. For these reasons I feel Krookodile is a very viable mon and I feel it definitely deserves a spot on this list.
Anyways, this has been brought up before, but I want to suggest Krookodile to be added to B Rank. This gen just happens to be kind to Dark-types (see: Bisharp and Mandibuzz), and Krookodile is among the numerous Dark-types that have a niche in OU. Krookodile can do quite a bit of work both offensively and defensively thanks to a number of qualities. Firstly, Moxie is an amazing ability, and Ground / Dark coverage is very good. The Knock Off buff helps Krookodile a lot, which gives it a stronger Dark STAB to hit those who are weak to Dark fairly hard, along with the awesome effect of removing items. The Defense boost does help Krookodile a bit, so now it can actually survive weaker physical hits in the event that such is necessary. Krookodile's Speed isn't terrible, and it can overall perform pretty well as a great sweeper. Defensively, Krookodile performs decently there as well, since Intimidate is also a very good ability, and the defense buff along with the prominence of Ghosts like Aegislash allow Krookodile to go defensive in this meta. Taunt and Stealth Rock are both very good moves, which Krookodile can use well, and it can also beat most variants of Aegislash thanks to its passable bulk and typing. Earthquake off of a good 117 Attack also gives it a bit of offensive presence, so it's not a complete sitting duck. For these reasons I feel Krookodile is a very viable mon and I feel it definitely deserves a spot on this list.