If 7DTD gameplay stood at the same level in A17 as in A16 i think there wouldn't be any problem with DP. Remember how many long time players jumped into Experimental and were overwhelmed? In A17 is quite more common to die from Zs (to some extent) due to the change in fighting and zombie AI. Of course, some will say that if you're smart you'll never die (or always outrun Zs).
On the other hand, most of the players that get used to the fighting and exploration, will eventually get this "buff" all the time, because they will adapt so well they won't ever die. Surely some of us already know how to fight and not die (or simply how careful to be not to die even when building, mining, etc.). This means that many of the players will have that constant 25% bonus (or whatever the max) for quite a long time.
The elephant in the room of this conversation is the faster rising GS. Lower attributes do not contribute or detriment your XP gains, they only make your life harder for a set amount of time. Considering not everyone wants to get a more difficult game the longer they play "safe", i would propose a few alternate bonuses for living longer (pick one really, as these are suggestions and not deeply thought over):
1. Loot quality - Like with Lucky Goggles, you might find better items in the world.
2. Better trader prices - Maybe not giving a big bonus, but beneficial enough so that people would see the difference.
3. Higher damage of tools/weapons - The longer you live, the better you are with hitting/shooting things.
Now i'll wait for someone to edit their buffs.xml and add a new "buff" for a multiplier in XP, Loot quality, Trader prices or higher damage.