Man Who Erased His Name is criminally underrated. It's basically an alternate Yak 7 with Kiryu in it before they recombine the storylines for IW, and even though it's a side game and a bit shorter, I found it to be more enjoyable than some of the main series entries. Specifically, I think it's better than Yak 3, 4, or 6. That's just me though.
Yakuza Zero is my favorite Yakuza game outside of the two LADs. It's so goddamn good and I think it got overlooked somewhat, much like MWEHN. Glad playable Goro is coming back in Pirate Yakuza. Was hoping PY would get here before this weekend so I could play it over the weekend, but unfortunately it still hasn't arrived (ordered it like a week ago). So instead I got in some more Deep Space Nine time (something I know you can appreciate). Almost at the end of Season 5 now. Been chipping at that show for several years.
I played Zero, Kiwami, Kiwami 2, etc all pretty much in a row back on the PS4 (2019 or so I think) and didn't even realize there was a framerate difference (maybe they were all 30 on the PS4). Can understand why Kiwami 2 would have an FPS drop, because Kiwami 2's visuals are much higher-res than the previous two. Better light effects and everything. Probably the prettiest game I ever played on the PS4.
I'd say Yak Zero and Yak Kiwami are the best one-two punch the series offers up until the two RPGs. The whole Akira Nishikiyama saga is something no other game or villain in the series ever managed to equal, and it ends with the first game / Kiwami. I don't know how the framerate is in 3-6 but I don't think anyone is missing anything crucial by skipping ahead from Kiwami 1 to the LADs. Kiwami 2 is worth playing but only if it's fun to play.
GL getting the plat on LAD and IW. I had the idea of doing the same thing recently and took a stab at both. It quickly became clear that they're both insane time investments and there was no way I'd be able to do them both. They join Fallout 4 as the only platinums I've ever made a serious attempt at and given up on. Think my next plat will be FF7 Rebirth instead, at least that looks pretty doable.