Unbalanced only if the faction owning the port have closed black market.I'm not convinced doing anything other than missions helps Elections cause it'll be so woefully unbalanced when a faction owns nothing but their opponent owns several ports and has a source of bounties that FDev might as well auto win the faction with the assets. Like Wars/Civil Wars it doesn't matter who owns more stuff because outright slaying CZs matters only basically.
If anyone has strong data on a zero traffic system I'll gladly change my view point. My PMF lazily does Poll Data missions and win Elections unopposed in most systems so my view may be tainted by our success.
Because yes, smuggling do work for election by negating the positive action made by the opposition, reducing in the process the ammount of positive work that you need to do for your own faction.