I totally get this -the first time I played Rickenbacker it seemed alien. And the hardware does look really cheap - it's like somebody hand built a guitar from scratch in the '40s.
But after playing one for a couple days, all of that goes away - the neck becomes normal and you ignore the hardware realizing that all of that strange stuff adds together for the great sound.
I've never bumped into sharp fret edges however, I wonder if that was more of the very narrow neck. If you rap your thumb you do feel the frets, but it's more due to the fret type and the thin neck. Again, I got used to all of the weirdness really quickly and found it a far more versatile guitar than I expected.
Of course it's the best way to do REM and Petty stuff, but I also found it extremely good for light crunch rhythm and leads-in the heavier environments, the jingle is muted and instead it cuts through a mix better than a strat or a tele.
And how else could you play blood and roses by The smithereens?