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Yup, in fact intel says that due to the fluctuation of particles during the change of dimensions in his ultimate Yoru will suffer momentarily testicular torsion and make you lose 5 hp for each second ur in the ultimate. This change is made so players can't just stay in their ult to abuse the gathering of extra info
Probably not
You need to realise that the reason Yoru is being picked a lot now is cuz his clone can activate Vyse's wall without putting bodies on the line, and Vyse is really good in this meta. He also combos really well with Breach, who also combos really well with Tejo. It's a chain reaction.
It's not like Yoru on his own is busted or anything.