Whenever you ask what the plan is for the assault Frigate rebalance, the answer is that CCP doesn´t know what to do with them, that they haven´t found a role for them. Well, back when the HAC rebalance was introduced, it was that they wanted to make them more resistant to eWar, that´s why they got more locking range, sensor strength and capacitor to fight damps and neut. Increasing speed was to dangerous just to make web less effective and there isn´t anything against tracking disruption without making them track too good in general. But there is also to add that back then, there didn´t exist the eWar-Resistance yet.
So rolling up that idea again, giving the assault line of ships a eWar resistance bonus of, lets just assume, 15% per Level, it would make them quite powerful in solo and small gang fleets where eWar is very important, while it would be a bonus that isn´t very useful in larger fights, as there you barely see any eWar beside target painters (and scram) applied.
Like this you could even justify that they only have the damage of T1 ships, maybe a bit more, and are slower compared to their T1 counterpart, as even though they are slower, they can only get slowed down by a small amount when webbed. Imagine, an AF would still fly over 500m/s with AB and under heavy Vindicator Webs.
I know this kind of idea has brought up already in different iterations, but I would still be interested in your thoughts about making the assault line fully resistant to eWar