Atlanta - If Sephy puts too much trust in dafran to be a starter given his volatile nature, things can go downhill fast internally. They also have a relatively unproven support line at the moment, but I give them a big benefit of the doubt.
Boston - Aside from the glaringly bad management, this team has big shoes to fill with the departure of Striker, Mistakes, and Neko (arguably their 3 best players throughout the first season.) Three main tank players when Gamsu seems like the best choice out of all 3 seems a little odd as well.
Florida - Mediocre roster overall under the same bad coaching under Mineral. I can't see this team being any better even with this 90% Korean lineup.
Houston - Their DPS have the potential to be just as (if not more) underwhelming than last season, leading to the same mediocre results. Hopefully their coaching staff makes the right rotations between the 4 players.
London - The only downgrade I see in this roster is with their coaching. London has nothing to really lose so long as they keep up the play they finished with in July.
NY - Logjam of 5 equally start-worthy DPS. Players like Pine, Flow3r, and SBB all could easily start and have huge impact on other teams, and they know that. How the coaching of NY will handle sharing playtime for these guys without internal issues is beyond me.
Paris - Lots of unproven talent and question marks here. Obvious star players like SoOn and SDB are sure to be highlights for the team, but the rest remain unknown.
Philadelphia - Hotba's departure to Guangzhou takes away a lot of the raw flexibility this roster showcased in their playoff run.
Toronto - Building around a middle of the pack Contenders KR team in O2 Ardeont is a strange choice. Despite this, Bishop's results with London (albeit for a single stage) speak for themselves, and for that I have some faith.
Washington - Stratus and Corey have a lot to prove here. Their support line seems weak, and SanSam's long runs with both Meta Gaming teams showed mediocre results. Building around Janus, Ado, and WizardHyeong was smart, but their lack of star power in the rest of the roster will certainly be a challenge to overcome.
Chengdu - Considering most of their roster are 2nd choices for who they originally wanted, and two of their DPS haven't been in competitive OW for a while, it's safe to say this team will be underwhelming.
Dallas - Rotating their DPS effectively will be a challenge for sure, as they all share very similar hero pools.
Guangzhou - Language barriers. Between Chinese, Korean, and English, there's a lot to work through. They have also signed Nero, who doesn't turn 18 until 3/4 into the season.
Hangzhou - A lot of their DPS have pretty overlapping hero pools, which makes for a big question mark as to who really starts here. Also Guxue, while being starter level, is at an automatic disadvantage for the spot against NoSmite due to the language barrier.
GLA - Easily the best offseason any inaugural season team has had. Improvements in every department. Despite this, the hole Fissure may have left as a shotcaller may put them in a slump.
LAV - SoOn has departed to Paris, and the fact that they haven't signed a replacement hitscan worries me. Putting that much faith into Bunny is a risk for sure, as he's relatively unproven on most heroes outside of Tracer.
SF - Again, logjam of DPS players all decently worthy of a starting spot on just about any team in the league (maybe outside of babybay.) Sometimes, this much flexibility and talent can be too much. Godspeed to Crusty and NineK in their efforts to keep 4 top level players happy with their playtime.
Seoul - They will most likely suffer from the same synergy issues they did last season. Munchkin also has big shoes to fill in the hitscan department, as he looked weak last season.
Shanghai - Their tankline looks like the weak spot at the moment, as they weren't able to win Roar from KDP.
Vancouver - This team has a lot of expectations on them coming off of a Contenders win. As well as what others have said, they need to adjust to playing at the level of OWL.