I'll readily admit it's been quite some time since I've looked at Lian Li cases, although over the years I've owned 4 of them. A quick look at their website right now it looks like they've kinda trying to adapt but aren't sure how.
PC-O10: Pretty sizable case at (W)242mm x(H)493mm x(D)376mm. Only radiator option is a 240mm or smaller at the top. Fan selection in general is limited/odd with 120mm fan x2 (Top)/ 80mm fan x2 (Rear)/ 120mm fan x2 (Bottom). I mean really? 80mm? Who does 80mm fans any more. SFX power supply which again, seems odd given the overall size of the case. Only two front USB ports. No fan hub/controller or cable management. It does have drive trays but they are dual drive trays so you can't just pull one drive.
PC-8F: I'd call this a more classic Lian Li case. Still pretty sizable at (W)210mm x(H)476mm x(D)500mm. Radiator/fan support isn't bad on this one. USB-C on the front so props for that. But, again with the dual drive mounts. Cable management is even worse on this case. No fan hub/controller, No PSU shroud, and having it mounted at the top is a bit old fashioned at this point. No fan filters on anything that I see.
PC-O11G: Again, pretty sizable at (W)280mm x(H)510mm x(D)470mm. No front/rear fans at all, just 3 top, 3 bottom. That would be a deal killer right there for me. USB-C on the front again, so props again. Yet again, dual drive mounts. Since this is a dual chamber case, they can arguably get away with no cable management. Still no fan hub/controller. It's not 100% clear from the pictures what the filter situation is, but it doesn't look like it's easily accessible.
PC-K6: Same general size range at (W)220mm x(H)495mm x(D)515mm. This is the first case I see on their site that looks to be a direct competitor with Fractal's and NZXT's similar sized/designed cases. But, again only radiator option is a 280mm at the top and by the looks of if you aren't going to get a push/pull even with a thin radiator. No USB-C which makes the inclusion of only a single 2.0 in addition to the standard 2x 3.0's seem a bit odd. Good disk drive setup, although I'd want to see the trays in person as I historically haven't been happy with plastic trays except on servers. This is the first case of theirs I saw with spots for cable management ties, although there's no cable management built in. No fan hub/controller. It does have a power supply shroud, but not a rear removable power supply mount. I don't like that.
But then there's the one bit I've left out. Price. This has never been Lian Li's strong point and still isn't. The PC-O10 is $210. The PC-8F doesn't appear to be available in the US. The PC-011G is a $310. The PC-K6 is the most reasonable one at $110. I've spent $300 on a case in the past. I've always regretted it because it wasn't that good of a case. I've spent $200 on a case more than once in the past because at that time, that's what a quality case cost. However, that's no longer the case. Of the above the PC-K6 is the only one that appeals to me at all. But it's more expensive than it's competition from NXZT and Fractal and doesn't offer any benefits over them. I've had two NZXT cases, the H440 Razer (because I didn't want a two tone model) and the S340 Elite. I love both of them. I went from the H440 to the S340 Elite because I didn't need the extra size of the H440 and because the S340 Elite has a top panel HDMI for VR. Personally those would get my vote, although Fractal's cases are great as well.