This is probably an unpopular opinion, but seeing the data and analysis, I feel that sentinel are bad, except on heavy defense map like Ascent they are good nbecause they are strong enough to make some site almost impossible to take, but on other map, I think 1 duel, 2 ini, 2 smoke might be better.
In defense, Sentinels are literally useless if they don't hit the site
In attack, Sentinel can't use their utility to take site (And in this meta that usually what make you win the map or not, if you can take the site with less dead than opponent = win), they can only cover flank and lurk, but nothing in their ability help them to lurk (except Cyph cage). Sure they could use their ability to defend the side once it's taken, but that usually mean they can't really lurk. I'm not even sure flank cover is that strong, because opponent can still lurk and take you from behind, sure you will know that might happen, but they can still surprise you by going back, continue lurk, and usually find another way. What is fun, the the only map where they are no doubt you have to pick a Sentinel, are map where KJ have strong retake ult, but retake are only 1 or 2 round, does that justify her pick ? Yes because her concurrence in sentinel is so bad that she is the best idea, no because team tend to think about picking no sent when they have no choice.
I think, Vyze will CRUSH sentinels, because she is the only senitnel that have utility in atk, and setup deadly trap in defense, but she might also crush initiator flasher, this agent allow you to have a flasher that can replace Breach and Kayo and still cover flank allowing you to take a 2nd smoker that can lurk heavily, and this is what will be OP. Doble sentinel is REALLY OP, and you want a doble initiator to take site, she can allow that, her release might be the biggest Viper up ever (Even if I think other smoker might be the 2nd smoker)
Now let's see map per map, what may be the best composition on the 11 maps and see sentinel state :
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