They actually nerfed his early game damage (max health damage by half in early levels) and just made his q more reliable to hit which does little damage and cost 50mana at all levels which cost more mana early than before. His buff only becomes significant at level 13 because with the cooldown on his passive. Overall at level 13 from the mid game to late game he becomes ineffective as he isn't a good team fighter, can't split push that well, easy to kite, no engage or peel (unless you count his E ability which has a delay & short distance), so you lose out on a tanky engage by picking urgot for your team, so i guess he can be useful by protecting the carry with his E. Telling you all this from experience since i just got out of a 1hour & 14min game with urgot, won my lane hard but my team was behind and I experienced every point stated above and lost the game. Even though i lost i had a blast playing urgot. love the rework.
(Remember to note which shot gun knee is on cooldown and fight/stay on that section because his passive is his primary source of damage)
Try using these champs against urgot
Rumble - poke & farm safely/dmg on par with urgot/better team fight, mana less
Gnar - better poke & auto range, sustain, mobility to escape urgot w, mana less
Renekton - can dash(s) away from urgot w, better sustain, better team fight, mana less
Teemo - If you have no mechanics so you can just blind urgot during urgot W
Riven - super mobile can avoid all of urgot's abilities and win trades by doing so (depends on skill level), mana less, better team fight, etc
kennen - range with autos/abilities, mobile escape for urgot w, better team fight, mana less, in general can destroy urgot top
Ryze - can destroy urgot top to lazy to state why but his snare is big reason part of it, etc etc
Yasuo - windwall for ult/autos, mobile, etc etc
-Edit-
Fiora - can easily reposite urgot's w since it has a delay/tell which then stuns him, Q or dash around him easily to avoid/position around his shot gun knees that are on cooldown. Fun match up