Would it get boring? Absolutely if you're trying to undermine the soak monster in every encounter. Mind you if you are I think that speaks more to GM vs players mentality than wanting to create a fun experience for everyone.
A GM doesn't need to think outside the box all the time. Only once in a while to make things interesting. The randomness of combat more than makes up for the other times. In one of the clips for the new Rebels cartoon, Zeb is shown dispatching a group of stormtroopers quite handily. This is what many people building their great fighter are trying to emulate. Being able to wade through many enemies is fun for them. That's why I don't challenge them any more than I would come up with challenging encounters for the slicer or the faceman.