Man, people are really downplaying how bad it is to lose to Latis right now. The fact that the Lati twins are both solid checks to Landorus-I IMO should be the main argument for dropping it down. Let's face it, if an offensive team isn't running Latias or Latias, it's probably offensive enough to the point where Lando is going to have a really hard time doing much against it anyway. And yeah, you can Knock Off, but a) that doesn't actually OHKO Latios, and even Latias takes it after rocks, sure it doesn't take it well but it takes it, which means Lando-I has to switch out or risk facing massive damage to the point where it's really easy to revenge kill afterwards (heck you even have a very good chance to OHKO after rocks even w/ LO knocked off assuming the standard 184 SpA spread on Latias and a naive nature and 10% LO damage on Lando) and b) the Lati switchin may be really predictable, but by extension, so is Knock Off. For that reason Knock Off is not a safe move to use at all, since the opponent can predict it and send in something else that can take one Earth Power like Keldeo (yes, I know Knock Off cripples it and it still takes huge damage from Earth Power but you still threaten an OHKO on Lando-I with Scald even specsless, and I know Psychic OHKOs Keldeo but you have to be a prediction god to predict Keldeo as opposed to the Lati to come in in that scenario) so if you knock off and that happens you've literally just wasted a turn, and now Lando-I is going to have to switch out without having done anything of note besides remove one item and will have one hell of a hard time coming back in since it basically loses to 60-80% of your average offensive team 1v1 (the last 40-20% being the stallbreaker and maybe the rock setter/Magnezone if included).
So yeah, Lando-I tends to really struggle vs offense. And sure, it's great vs balance, but so are all 5 mega wallbreakers (MMedi, MHera, MGarde, MPinsir, and YZard), if anything even more so because their main STABs are far more spammable and don't have an omnipresent immunity, they have more power backing them up (with the exception of MGarde who, fun fact, hits exactly as hard as Lando-I - do the calcs if you don't believe me), and are just way harder to switch into in general. 2 of these have lesser bulk which compromises their ability to abuse defensive Pokemon as well as their ability to do anything vs offense (though MGarde has one guaranteed switchin vs offense under the form of Latis which is nice), but the other 2 have either comparable or higher bulk (hello Mega-Heracross) and, much like Lando-I, have pretty damn good defensive typings to back up that bulk too. In terms of prowess vs offense+ability to make defensive teams cry, I really don't see Lando-I as superior to MPinsir, or even MHera or YZard come think of it. I guess an argument can be made for versatility, but at the end of the day it's really just one move (and if you run anything other than Knock Off, then you're pretty much useless vs offense since Latis just laugh at you)
