In PARA 2.6 and higher you can replace selected items from your array with new object, only condition is that the both old and new objects must have similar modifiers.
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adaptive component
animation
array labeling
array variable
bitmap controller
boolean objects
closest point
collection controller
condition controller
convert controller
curvature analysis
curve controller
custom attribute
ffd modifier
fractals
graph controller
interpolate controller
key frame maker
l-system controller
linear controller
link controller
list controller
loft objects
magnet controller
math controller
mesh controller
mix controller
offset controller
paint utility
para link controller
parametric array
parametric design
parametric facade
parametric mesh
pattern controller
random controller
reorder transformations
sub-object controller
sub array
surface controller
Surface domain
surface modifier
surface paneling
transform controller
vector controller