It'a a Small World is not my favorite ride in terms of fun, but it is a nice, long ride to go on when you are tired but feel like you need to ride something just to feel productive!! Plus, I LOVE LOVE LOVE the holiday version of It's a Small World - it's gorgeous - and I would be very disappointed if DLR ever got rid of it. IASW is just vintage DLR, though, so no matter how much I may cringe when I hear that song, it IS Disneyland. Disneyland would never be the same without all those annoying little dolls singing!!
I would never advocate getting rid of IASM, ever. I hope it stays forever and ever. I'll just probably never ever go on it again.