Yeah dribbling is the most important aspect of the game for a point guard. I couldn't think of a point guard playing in the high level with shaky dribbling skills. Such player isn't going to survive. A point guard with questionable shooting but with decent handkes is much better than a point guard with very shaky handles but with decent shooting.The thing is, if your center & "four" has decent dribbling, that would be a big plus.
For me, a prime Andray Blatche was effective for Gilas mainly becoz for a 6-foot-10 big man, his ball handling is pretty decent. A Dray Blatche with shaky handles would be much less effective for Gilas.