You can currently have more then one front or back weapon on autofire. Put the weapons next to each other, then quickly right click the weapons back and forth and eventually you will get both weapons green and autofiring. I did this in my T2 escort ship because I am not paying to spam the space bar key for something as stupidly simple as fire all forward cannons/phasers when available.
I have no issue with hotkeying special abilities, directing power to shields manually, hitting spacebar to attack when an enemy comes into your weapon arc range, etc. However, spamming the spacebar is annoying, painful and only detracts from the game. There is nothing tactical about having to spam the spacebar to fire weapons every 2 seconds in this game.
I've been told you can get up to 3 autofiring front or back weapons this way, more if you lag out the game by taking as screenshot or something similar.