vladimir is not bulky dps, he is squishy come late game where anyone who hasn't invested in EHP will die in seconds
the best bulky dps in the game right now is jarvan. even with all the nerfs to his burst, he still does good damage with a triforce and atma's, and he still initiates fights insanely well. if for some reason you don't want to learn jarvan then other solid choices would be gangplank (es op), yorick (es op), rumble (es op), udyr (es op), warwick, alistar and irelia
happy about corki nerfs, after the ashe nerf there is no reason not to pick him as your ad carry now. if corki was released next week, people would be crying op for sure, but the reason nobody's been complaining is because he's been out for so long with little changes. the nerfs i would make would be increasing cooldown on valkyrie (bs escape), removing phosphorous bomb's stealth reveal and reducing damage or increasing mana on the ult
annie nerfs are meh, her early game isn't as strong as some people make it out to be, it's her midgame and lategame that are devestating. she is weak in the first four levels because her pokes don't do enough damage and they're on high cooldowns too. you can lose to a strong laner like caitlyn, pantheon or tristana easily because their pokes are regular and strong at early levels. i do think that she is a powerful laner despite that, though i wouldn't advocate any nerfs to her early game. nerf later ranks on tibbers damage, imo, or increase cooldown on incinerate (bs spell)