If you have a a security passcode setup, once you enter that you should be right into you're homescreen, not the clock/date that you swipe. Only if you do NOT have security enabled will you see that swipe screen when you hit the power button. Something is wrong with you're phone if you have to swipe that even after you key in you're pass code and hit okay.
I happen to like that swipe screen. I like how you can customize that wallpaper on there.
How do you customize the wallpaper in the swipe?
Settings > Display > Screen Display > then under "Lock Screen" press "wallpaper" and you'll get the "Select from" prompt. Then click "Gallery" and choose from you're own wallpapers. You'll also have to go back to that "Screen Display" page and adjust the "Clock position". Top, Middle, or Bottom as you like.