Split stays are doable and it just depends on your way of visiting Disney. We personally have done split stays before, but we prefer not to. Ours consisted of one day at BC, several days at All Star Sports and one day at WL. We did not like checking in and out that many times personally and probably won't do it again.
Now BC and WL are both absolutely beautiful!!! Our daughter enjoys both but prefers BC over WL. Whereas DH prefers WL over BC and I'll take either one, but WL is much more laid back and serene in our eyes.
Although AOA does look very interesting, we are looking at WL for our next stay.
So just think about what really interests you as far as theme or location and how you normally tour. We have the once we're in we're settled and prefer to stay that way.