They did IMO seem stronger than Challengers 1, so I think the odds are higher, especially with another spot being available.
A big factor will be KAY/O, and how well they adapt to him. That goes for all teams though.
I definitely think there is a good chance though. But I feel the playoffs will be hard for every team, including SEN. If teams like C9B, T1, V1, and GenG make it to Playoffs, it will be really competitive between the 8 teams where I think there is a legit shot for every team to make it to Berlin if they get a good handle on the KAYO meta. And close enough in competition that even a team like SEN will need to play in top form to make it to Berlin.
My hope is that teams that came up a little short in Challengers 1 like C9B, T1, even teams like FaZe, Soniqs, Luminosity and Immortals (Obviously all of them can't) can make it to the Main Event then Playoffs so the competitions and games are super exciting. Maybe a TSM miracle run cause that would just be fun.