Re: Ally Switch
I see no reason to bother voting on this. Giving up a moveslot for it is typically difficult on most Pokemon, and at this point it's a well-known enough facet of the game that everyone should expect Ally Switch when they see a Cresselia or Rotom-W. The Pokemon that use Ally Switch are quite rare, and it's a powerful one-turn changer, but it's by no means overpowered because it's sort of like a less-powerful form of redirection that can easily backfire. If someone could point me towards a game where it is shown to be inherently uncompetitive, I'd think about it, but at this point Ally Switch is one of the few things that I wouldn't consider looking at. I also doubt the vote would reflect much different from what I've outlined in this paragraph regardless.
Re: other tests
I think towards the end of Snake draft is probably a good time to do some tests if we do any at all, and at this point in the meta I believe the most useful suspects to be done would be re-tests, as I see no outstanding threats that have flown under the radar. However, since we just tested Mega Gengar and not much has changed, retesting that doesn't feel right to me. So, our options are basically limited to Swagger (Fini makes this too strong), Snorlax (still awful to deal with, the last Pokemon we banned and it was very decisve), Mega Kangaskhan (unless something drastic changes, no), Jirachi, Marshadow, and Deoxys-A. With Intimiroar and the popularity in threats that force Deoxys-A to run a +Speed nature again, I would be surprised if a theoretical Deoxys-A retest went the other way, and I don't think it's particularly problematic at this point.
That leaves Jirachi and Marshadow. I think these are our two best options for a potential retest. Jirachi was banned by only one vote and since then, Intimiroar dropped, Mega Gengar got better, Stomping Tantrum Metagross dropped, and various other shifts have made the meta less easily controlled by Jirachi. However, I'm not sure anyone really wants Jirachi back. It brings about the chance of being flinched to death, offers tons of free turns to its teammates between redirection and speed control, and generally shifted games to a very different direction from the current meta, which I actually think is pretty great.
So Marshadow. I know some people are *very* adamantly against even considering this Pokemon, but hear me out. Marsh is an offensive powerhouse, but the introduction of more Intimidate Pokemon (including the rise in popularity of Mega Manectric), as well as the introduction of Zeraora, the surge in popularity of Mega Gengar, the general bulking up on the physical side of some Pokemon due to the threat of powerful physical attackers like Tapu Bulu... honestly, a lot has changed that could make Marshadow more manageable. I'm not going to die on this hill or even say for sure whether I'd want it to come back, and I understand that some people don't like Marshadow, but I do think it could deserve another look.