I've been asked to post this by numerous people, so now that the deadline for UU essays has passed, I can.
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After much deliberation, I have decided that, if given the opportunity, I will be voting to keep Raikou in the UU tier.
The only conceivable BL aspect that could be applied to Raikou is that of the Offensive Characteristic. However, my personal belief is that not only is Raikou's ability to sweep on its own is not too great for UU, but the ease of which it is supported is not too great either.
Its sweeping sets are relegated to Calm Mind + Substitute, Calm Mind/Charge Beam + 3 attacks (and Life Orb), and Restalk CM. Beyond that and you start to get a bit gimmicky and because of this, right off the bat, there are already a great number of things hindering Raikou from meeting the offensive characteristic for BL.
The first of which comes from the fact that there exist quite a few 100% counters for Raikou, or at least 100% counters for each set. Chansey can take on any set not named RestalkCM. Donphan can take on any set period. Steelix with some SpD EVs can do the same as Donphan. Registeel is a full stop to Raikou (though it does lack recovery). Curse Umbreon can also take on every set. Claydol makes quick work of all Raikou. Specially defensive physical Venusaur can take on every Raikou, Regice can also take on any variant (though this is a bit of a reach considering its use is low).... and this is just to name a few. There are more, though some have to be a bit more specialized to beat Raikou (such as putting more SpD on a Regirock over the preferred Atk EVs)
Simply put, stall is in no way shape or form afraid of Raikou. So in terms of teams that Raikou can hope to sweep, stall is taken off the table almost immediately.
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Raikou is often touted as having an incredible ability to set up on tons of things. However, in practice this is simply not true. In terms of offensive threats (and I am only using offensive threats, because in the previous paragraphs I've already shown how stall could give two shits about Raikou), Raikou's potential set-up bait is kind of limited. This is because though Raikou definitely has fairly good defensive stats, it has hardly any resistances (only three to Flying, Steel, and Electric) that it can get in on, which means that a majority of the time it is going to be hit for at least somewhat significant damage on the switch-in.
In terms of Pokemon in the top 40 that it can actually come in on and set-up easily even including Pokemon that are generally only seen on Stall, you will see that the list is fairly lacking.
#4 - Uxie
#5 - Mismagius
#10 - Froslass
#12 - Milotic
#13 - Spiritomb
#22 - Slowbro
#25 - Blastoise
and that's it... this is far from "80% of the metagame" that many will attempt to say.
Though, to be fair, this list is a bit lopsided as when I say "easily" I mean that these Pokemon have little to nothing to do against Raikou; they're "free set-up." However, it just goes to show that Raikou is not getting in on shitloads of Pokemon and setting up 6 Calm Minds and sweeping teams, as the majority of the top 40 in usage can hit it fairly hard if it attempts to switch in, and with Raikou's lack of resistances, it's not coming in on much that's not hitting it hard.
With that said, you could claim that Raikou doesn't have to switch in to Pokemon to be a threat and force something out and get a free Calm Mind, which is true, but there are so few Pokemon in the top 40 that are threatened by a +0 Thunderbolt that they will switch out and give Raikou that free turn. In terms of being threatened by an OHKO if they stay in predicting that Raikou will Calm Mind, only #3 Honchkrow, #21 Azumarill, #23 Moltres, #26 Kabutops, and #38 Omastar are on the list. Literally everything else in the tier can at least take a single +0 Thunderbolt and return with significant damage that puts Raikou into easy revenge killing range, or outright KOs Raikou itself.
In summary, Raikou does not have enough viable switchins / force outs to consistently get any more than a single Calm Mind, and normally this Calm Mind comes at the expense of so much of its health that it becomes easy prey for the priority laden tier that is UU, and as such, offense and balance come off the table as well as far as teams that Raikou "absolutely destroys."
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This is not to say that Raikou is not a good Pokemon. It is, believe me, I played enough with it to know that it is definitely a top level UU Pokemon. However, it is not so dominating against any of the three major archtypes of teams that it can be said to absolutely blow through any team with certainty, much less the "majority of teams" that it needs to in order to meet the offensive characteristic. In short, Raikou is a very good Pokemon, but BL it isn't.