So I just completed a run through act 1 trying the builds almost exactly like you suggested. It was crazy effective. Exactly how I wanted to play, where I felt I had creative solutions to each fight.
Problem is that while it can be made to work, it's just not as effective as overspecialization
That is literally true in every video game, except in some hybrid builds straight up DO NOT work.
They work here. They're maybe 'sub optimal', but they WORK.
It is true that it's in all games, but there's a problem when the difference feels so very very large.
Edit:
To give a comparable, if skewed example -> You can beat Dark Souls with a basic dagger, but this is heavily frowned upon because it's so woefully inefficient compared to any other weapon that you might as well be doing 1 damage for every 100 of theirs.
Something being viable and something being balanced are two very different things. The difference in specialization and hybrids shouldn't be nearly as wide as it is and specialization should have some kind of trade off, but it doesn't really feel that way.
