Well, sounds like lot of butthurt going on from ewars, so of course, the easy response is nerf them, so you do not get owned by them...
The problem is not fast ewar groups, the problem is "you" and your choices.
Yes, ewar is fast, and other than demob, has long range effects. However, ewar has a paper tank, a speed fit ewar that does get demobbed is basically dead, and the dps from 2.5 ewar = 1 assault bot at best.
How "you" should handle ewar gangs - have scouts at teleports. Forewarned is forearmed. Respond with fast ewar groups, with demob, and assaults for dps on demobbed targets. Look at your intel channels to see when gangs have come onto your island, drop what you are doing, get in gang, and help hunt them down.
Ewar are EASILY killed, when handled appropriately. Need to go faster to catch them? Get Nav to 10 and equip a T4 lightweight frame. But you too will also have a paper tank then, and be on equal footing with the enemy ewar.
Pppl need to understand that they have to think abit, and put effort into it, in order to respond to a fast ewar gang, instead of responding with "it needs to be hit with the nerf bat" because "you" have either gotten pwned by it, or unable to engage them because you are trying to chase them in assaults or light bots.
BTW, most fast roam ewar setups for wolfpacks usually are just sensor amp, demob, and tunings. Start fitting a full ewar setup, lets say ap, demob, and 2 ewar mods based on bot bonus', and the first thing you see if it has guns and rep, is that it is going in the mid 90's at best . At that point, if you want speed, you have to sacrifice the guns, and do no damage..
So all this crap about op and unfair is just that, crap, by ppl who either do not think about how to counter, or do not want to have to train the skillz and go to the expense to properly fit a bot to counter them.
In the gods we trust, all others bring data!