Sad Grenada Seasoning Pepper plant

Trying to save this plant from last year, hoping for some pointers.  Growing in coco+peat+vermiculite+perlite+mushroom compost.  Pruned back after a not very productive summer, maybe 12 pods total...
 
New growth is very very pale and clumped (short internodes?) Yellowing of older leaves with brown papery margins.
 
Is this nitrogen deficiency?
 
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Also wondering whether I should cut back the branches altogether to maybe 6 inches from soil to sort of start over?
 
I'm in zone 10a
 
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