No class deserves and deserved an update more than divers
the class of generic no niche hard cc tanky burst mobile melees the class where you just pick the strongest one in the class disregarding any strategy in the game the class with the biggest amount of generalists
good examples of divers:
counters champions who rely on a single spell to escape like vayne/twisted fate, he can kill them with his spellshield easily if they're alone
counters invisible champions with her W
counters burst champions and single target CC like malz ult with his W
counters champions like singed and olaf that run fast while being hard to lockdown
i don't understand why he's a diver instead of a skirmisher as he lacks of burst and has way more DPS, but this dude is the only melee able to kite other melees like a ranged champion
best engage in the game
now comes the bad designs:
mobile tanky champion with burst and hard cc, a generalist that can be picked in every games without doing better in a game than an other
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some divers also do not offer any counterplay, anything to dodge what so ever:

the diver class really needs something, and high elo diversity would be better if those 2 generalists got reworked already

edit: forgot 
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is a skimisher. 