Circumstances have changed little. Manaphy and Swift Swim + Drizzle certainly had a substantial impact on the metagame, but unless someone can give a good reason why Pokemon that have already been voted OU would be changed so much by the removal of those factors that they would cause them to be uber when they were not before, they should not be permitted to be nominated again.
Yeah I'm really not seeing what has changed that people are still nominating Excadrill, Latios, and Reuniclus.
The swift swimmers did not check Excadrill, the presence of Drizzle did. Excadrill outruns the main three in any weather other than Rain. It also outran ScarfMin and below, so the exUbers, so really nothing has changed. None of its major checks have been banned, none of the other weathers have been banned, none of its counters are removed.
Reuniclus. It is checked by a decent range of threats from CBGross to Tyranitar to Scizor to Spiritomb. The metagame still outspeeds it and can revenge it even if it beats something, and if anything it has to deal with equal to or more powerful attacks than the likes of Ludicolo and Kingdra (see: Specs Tornadus, LO Starmie, NP Thundurus) still.
Latios is less hindered now that Kingdra and Kabutops can't revenge it, but that's about it. Steels are still great checks to Latios as they resist its STABs. And even though the original Drizzle trio may not be around, Starmie and the genies now rise to fill their place. It still has to deal with SpD Tar and Scizor, and is outrun by any Scarfer.
So I generally agree with you, Thorhammer. I don't believe there has been enough change to make their repeated nominations justified. The reasoning was sound last gen with all the suspects being so intertwined but that isnt as much the case this time. We need to be sure that rather than saying "oh the metagame has changed," we actually evaluate the changes
relative to the suspects. Hopefully this voter pool wont be the one to send them off.