That's where the vast majority of the love for that game comes from, people who prioritize exploring an in-depth combat system above the other components that make up a video game, and that's just not me. If I'm gonna learn and get into the nuances of a game's mechanics, the whole game needs to hold up, and with its boring cast of enemies and level design, its not enough for me.
W101's the complete package. DMC3 is training room simulator, working best in Bloody Palace.
It's not the complete package, though. Not in the area that Devil May Cry exceeds it. That's why Devil May Cry is the superior offering for those looking to explore one of the most in-depth action combat system in gaming.
So, it's a "complete package", but a different sort of package. It's an action game has a more balanced approach to its other areas, whereas Devil May Cry throws it all in service to exploiting and exploring the depth of its combat system. The enemies, which you deem as 'boring', are
conduits for this exploration, and are almost always set up so that skilled players can exploit the system for the highest possible gain.
Wonderful 101 is more frenetic and insane with its gameplay variety, but looser, not quite as deep - but still very engaging - and, of course, its gorgeous clean visual style is very attractive. It also has very compelling boss fights, although to be honest the horrific touch screen shit did put a secondary damper on the experience. By default I have to dock it for that... no true pure action game would have such a shit crutch that doesn't even work right all of the time.