If you're only five hours in, then you're almost certainly still playing on DH. Yeah, DH mode is anemic compared to DMC3 and 4, but on the other hand this is intended to be a point of entry for new players into the series as the last game was released eleven years ago, and that means some concessions have to be made on the difficulty slider since DMC plays fundamentally different to other spectacle fighters that hit the market since. You definitely have to course correct for SoS and DMD mode, though.
Nero's an all around improvement since DMC4, in my opinion. His character is much-improved, and his game play is a lot more fun. The biggest surprise with it, is taunting has a lot of function now compared to Dante's, or Nero's own in DMC4. Nero's taunts actually have a purpose beyond cool factor and style points -- his aerial taunt is an additional jump that grants an exceed window, his Red Queen ground taunt does the same, and his reload taunt gives you a free and instant color-up. You really have to learn to taunt as Nero for those additional effects to do well.
Devil Breaker mechanics make for really varied play that's not always predictable, that force you to change tactics on the fly and make tactical choices when to break and to not. The results are not always what you expect, and not always for the worse. Hell, due to dumbass mistakes during their respective levels, I ended up beating Goliath with Sweet Surrender, and Gilgamesh with...Pasta Breaker. Hilarious, and awesome. My first Nero SSS-rank was thanks to a random pick-up Buster Arm and a rage-fueled psychotic break against a horde of Riots.
During Nero mission 13, that last big fight I accomplished without actually hitting the ground once and in SSS-rank the whole time, thanks to Gerbera and nailing the timing on aerial taunts and jump cancels. Felt great.
Honestly, I like DMC5 Nero more than I like DMC5 Dante, and that's a statement I never thought I'd be making.