I love options. The only issue I ever had with these books is with 4e DnD Insider. Having _all_ the options in an electronic format slowed down character creation to a crawl, made it more likely to have unbalanced options, encouraged min/maxing a bit too much for my tastes, and put me in a position of saying "no" more than I like as a DM. With physical books you could have exactly the same issues, but in my experience we did not have it to that extreme.
So while I love options, I'm hoping that future electronic tools make it easier for me to filter out the options I don't like, and I'd be happier with fewer, higher quality options. I like to say yes to my players, not no.