Actually, I really think the more relevant point isn't how easy Sentinel is to beat, but how much of a chore it could be. The character with the easiest basic attack patterns to learn and execute, beams on tap, and also the biggest damage sponge.... eh? Even if Sent is vulnerable to instant overheads and has a huge crouching hit box, the bigger problem and pink elephant in the room is that Sent's balance made people lazy. Having an extra vulnerable hit box means a lot less when you got so much health you sometimes don't even notice eating damage because you were playing stupid.
Guys like Thor and Haggar need their Mighty Health because they're going to suffer all kinds of shit and do so while executing a much more intricate and varied strategy compared to the generic Sent usage. A great point was also brought up about the health adjustment making picking Sent purely for easy mode assist obsolete.
Compare Sent to Modok, who also "suffers" from having a huge crouching hitbox, huge easy to hit body overall, but less than 1,000,000 health. Modok can be a great character, even deadly, but Modok players cannot play stupid like Sentinel players could. If you don't know how to play Modok you get destroyed easily.
Honestly, I'd RATHER play Sentinel with less health, because now the character seems less boring. the overall point is that whatever the matchup and whether or not Sentinel was universally OP or not... the character was thoughtless to play and a psychological crutch for even good players. IMHO, I suspect that's why we haven't seen a lot of Sent teams winning tournaments.... because in the streams I have seen at least, teams built around Sent even at higher levels are just using Sentinel on auto-pilot half the time. Lazy attributes encourage lazy play.
Edit: I should added that yes, I think Sent's balance was lazier than anything else in the game, including DISRUTAR. There's some temptingly easy and effective angles with many other characters... but nothing as bad as Sent.
