Dr. Boom is generally annoying to deal with but if you anticipate it, you can deal with him and the rest of the board with a well timed blade flurry, or with some cheap removal like backstab and eviscerate often powered by spell power or a cheap minion. Being able to deal with the 1/1s with hero power is also another small advantage other classes might not have access to. I've certainly lost games to dr. boom, but more often than not it's because the boom bots snipe minions.
When I am ahead, sap is often a game winning move so not sure about people saying boom cannot be sapped. If your opponent plays dr. boom twice, that is two turns they aren't really dealing with your board. And often the delay of one turn gives you time to set up to deal with dr. boom efficiently.
That said, I do think rogue gets a tiny bit better because loatheb and dr. boom are out of standard.