In the time that DNF has been in development coverbased shooting has been invented and then done to death. Several times. People have been asking for the return to health kits for years now. Actually longer then it would take to make an entirely new game, which is what gearbox should have been doing in my Opinion.
Duke Nukem was the character People hoped would bring back health kits, the ability to carry many exotic and ridiculous weapons and reasons to go and explore levels.
And then he didn't.
Whoever was responsible for this: Why? Why would you yank this old character out of the old school shooting and stuff him into cover based health regenerating blandness?
Duke Nukem, of all the game characters in the world is probably one of the least fitting characters for coverbased shooting. I have an easier time imagining Link behind a column in a cave and shooting arrows at enemies.
On the top of my head, i could think of several solutions to the regenerating bs. Have health regenerate slowly. If a player wants to sit on his as for a rather long time, he might do so. If he doesn't, he'd better remember where those healthkits two rooms ago where.
Gearbox hasn't had enough time to think of something like that and had the duke take cover liker every shooter character nowadays. If any Company who puts these shooters out wonders about rather low sales, they should be tactfully reminded that there are about a million games around which do the same thing.