As far as the awkward slices go: Yes, they are! I cut my cakes into 16 wedges, and then it is easier if the wedges are sliced horizontally into about 3 slices. IMO, it works better than the thin slices all vertically. I haven't given one away yet sliced like that. (I have just done the vertical cuts) I am considering doing it sliced partially through on the horizontal cut.
Another idea is what my husband calls a "low profile" cake. I use my same pan, which holds 2000 gr recipe, but put a 1000 gr recipe in it. Still pretty but makes a slice that ends up being easier to hold.