I find my Sloane to be a very functional bag and I really enjoy carrying it. Proportionally it wears a bit bigger than the veneta because the bottom does have more structure to it, but it isn't so big that I feel like I'm constantly bumping into things with it. I really like the overlapping magnetic top flaps - more secure than an open top tote, but easier to get in to than a zippered veneta. I know some people say they are hard to get in and out of, but I haven't found that to be the case for me.
All of that said, I have a newer one made from light calf and wonder if I might love it even more if it were nappa. The light calf seems to help from the weight perspective and appears to be just a bit more durable on the corners (which do show wear on the Sloane), but it just doesn't have that luscious, buttery feeling that the nappa bags do. And while it does drape and slouch, it just isn't the same as the drape and slouch of nappa. If you are open to purchasing pre-loved, I would definitely recommend looking for a nappa Sloane from a few seasons back vs the new light calf version from the last two years or so.