I've contacted @Jishnu Surô to know if his stock camera ports could be finished by correcting the things that does not work.
He answered me he has already done so, and gave me this link:
I had previously installed @ballshanglow 13MP Camera on Pace Plus 4.4.3 (by disabling the stock 8MP one) and just installed Jishnu's one as described in his N5 thread.
At first glance, everything seems to be working alright. However, i think we can check out and report him if anything need to be fixed/improved/implemented.