Years ago, there was a bug, which let you play in FP. (Youtube Vids might be still around.
But it sucked hard.
A few people enjoyed it, but the vast majority suffereed from severe cases auf motion sickness.
Not only that, but the severly limited FOV made the game borderline unplayable.
There are enough FP games, wich platforming. Must are awefull. The few that aren't can very much be counted on one hand.
Mirrors Edge was quite good, although is features almost no combat.
Something which EVERY good FP jump'n'run relies on, but Warframe lacks, are handcrafted levels.
For FP jump'n'runs you need VERY carefully crafted stages, which generate a natural flow of movement.
There is not a single noteworthy FPS jump'n'run which features procedually generated maps.
Maybe in a few years, when there is an AI capable of crafting said flow, but right now it's just not practical.