的 => about (change noun into na-adjective or adverb) N3
ながらに => while; during; without change; performed in this condition N1
~ながらに      => while; during; without change; performed in this condition N1
くする/にする => To make, to change into N5
Change, cause and effect
...かえる (換える) => to change; to alter; to transform; to convert; to turn N3
Result status
[次第「じだい」]では => Depending on A, B may change N2
Based, Focused, Depending on
[一方「いっぽう」]だ => Change A continues, A does not stop N2
Miscellaneous
てからというもの => After A (happens), B changed (major change, everything changes) N1
Information, Report
にして => At the time A, While A, At the stage/point A, B happens (B is important change/first time) N1
Time, Situation