A SURVIVAL game should make you struggle for SURVIVAL. That is part of the genre.
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"Survival" is still the same, even if slightly tilted from your/my view.
For me core of the survival genre is environmental survival. You need to drink, you need food, you need heat if it is cold, you need cooling when it is hot, you need rest (stamina). Maybe water and food is affected by weather, early winter might destroy your crops before harvesting. Then you might get a struggle surviving in winter because of low food. Maybe even you are forced to move your location because of environmental changes.
That doesn't mean you have always fight for food and are nearly starving all the time, but imho also in midgame and endgame it should be possible for situations to occur that make it a temporarily struggle again. (But maybe such things come with the event-system?) Just plant a huge enough garden, maybe even oversize it as it takes no maintenance at all, harvesting is quick and the harvested stuff doesn't even spoil, and nothing unexpected can happen (like crop failure, infestation, lack of water, heat, cold, moving radiation clouds, ...) has nothing to do with "survival".
The Bloodmoon basically has nothing to do with "survival". It's just towerdefense or... is there a special name for genres you fight just enemies coming in waves? Or would you call Doom or Killing Floor "survival"?
So yes, i'd say too, 7 days to die goes away from survival and becomes more like a loot-shooter. It's still a crossover with survival-aspects, but they have become minor. Figth through POIs for loot and "survive" bloodmoon is not "survival". That doesn't mean i don't like it, i do.
Basically if you turn off bloodmoon, then you see what's left in the game what is true survival.... and it is obviously not much.