From my experience, I always shoot better off ice and every stick feels pretty good. I find it's because, everyone is more balanced off skates, and can shift their weight more easily to get more power. In addition, there's more friction, so getting the stick to flex properly is easier, and because there's no snow on the blade, it's easier to generate spin on the puck, so shot comes off hotter.
As for shooting with a bare blade. I've only done this a few times at stick and puck while contemplating only covering the toe of my blade with tape. Yeah, it'll feel different. I find tape acts as a dampener. Without it, the puck feels more lively. When the blade gets wet, it doesn't have anywhere near the grip that tape has. But for me, it didn't didn't drastically change anything enough to make me want to not have tape over all of my blade.