I want to talk about natsu limited soul manipulation before this thread gets closed. When acnologia took control over the ravines of time, his spirit/soul was left behind while his physical body left the ravines of time and went to the real world to cause

Crunchyroll Translation

Crunchyroll Translation
absolute destruction.
In the ravines of times, natsu and the other 7 dragons fought acnologia's spirit/soul form, in which both natsu and laxus were able to hit acnologia spirit/soul form. Although laxus was able to hit acnologia, he couldn't do any real damage to him because of his magic resistence, but we can still see that acnologia was hit by laxus even tho he was only in a spirit/soul form.
here is a link to the chapter where laxus hit acnologia, and you can see the lightning around acnologia face telling us that he was indeed hit by laxus.

Crunchyroll Translation
Here we also see natsu hitting acnologia's spirit/soul form, and destroying it.
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We can see this also in natsu vs zeref finale fight in which zeref stated that natsu was setting his own soul on fire, not only was he burning zeref magic, but he was also setting his own soul on fire.
So i believe we should give natsu a limited soul manipulation for being able to attack and hit acnologia spirit/soul form and for being able to set his own soul on fire to get a boost in his magical ability.
I also think we should give laxus a limited soul manipulation for being able to hit acnologia spirit/soul form, althought he couldn't do any damage. But that was because of acnologia own magical resistene and not because it was laxus fault.
I will say that the other 5 dragon slayers beside natsu and laxus should also get a limited soul manipulation because of the fact that they were able to see and fight against acnologia, and i believe that if they're able to get close to acnologia they would be able to him just like laxus and natsu.