That's all well and good, except navy has no real way to control the board themselves, and their edge counts are no where's near what Jedi are at even with twists although the newer sets are starting to get better in that regard.
Your not going to deploy 4 units every turn and units like Yoda, obi wan, Luke, speeder bike, kyle, etc can kill and/or focus multiple units themselves.
Multiple units do help...I've seen fighters do well against jedi ever since they got 3 health ties and better resources
That sais... 4 to 7 tactics a turn is nothing to scoff at even with fel.
Jedi is out of control atm as far as control and bombs...but I agree fighters are getting there and swarms do help.
The problem is you need 4 to 6 units just to survive a spider plus yoda and still have a free defender for luke. (if you can't won't edge which is likely) and Luke will more likely than not.. not be killed by that last unit .
At best you prevent unopposed and/or one bomb depending on the edge ..at worst your defender is obliterated