As duelist? Yes. As flex? No.
If they're moving zekken to flex is just not worth to have him on team, Sentinels is a mess because they are making players not play at their strongest and comfortable roles.
If they put Tenz on duelist again is way better to have someone like Sick than Zekken, but zekken has a lot growth potential but still uncertain. The issue is that if any player from SEN underperform they will lose because they start a match already 4v5 by lack of firepower from their IGL.
Basically no one from SEN can underperform otherwise = GG
Sacy, Tenz, Pancada, needs to play at highest level ALWAYS since they already has someone who underperform every game.