Myself and my regular Wing mate have teamed up for years, both of us deploying out Crew-Piloted Fighters and we've never noticed a problem. Fps remains great - and that's actual experienced fps, not reported fps - and we notice no issues outside of the odd usual game quirk. We both have decent, if not latest and greatest PCs, with solid internet. We were both doing this primarily while doing some NPC bounty hunting in a Haz Res, though we would see the odd other Commander to. We'd always invite them to join us, if we thought they too were there to bounty hunt. Sometimes they'd join, sometimes not. No worries either way.
Last time a ganker tried to get me though - and I say "ganker" as I was in a barely-engineered (bar the shields and some of the turrets I robbed off something else) trade ship on the way to outfitting, no cargo, not wanted, not an opposing power etc. - my performance went to carp and they were teleporting all over the place from my perspective, not taking any damage, and I took sudden massive damage, while being frozen on the spot. Aka, throttle worked and speed indicator went up, ship did not move. Dunno what happened, but my UI even froze - I couldn't look left or right to access the panels, even though the ship was powered. My game UI was basically frozen, the only button that worked was "Esc" and I did a legitimate Menu log. I was then greeted by a load of abuse by said Commander for "Combat logging", when I did no such thing. My UI crashed - so I thought - due to what I suspected were Network issues. I mean, I wasn't playing the game any more, the UI wouldn't let me and I was entirely unable to interact with my ship. What else was I supposed to do? Of course, they ignored what I said as they knew all and everything and were the most important person in the entire game. I was there just to be entertainment for their sadistic role-play lol. I was more irked by their arrogance at the time, considering what their arrival did to the instance, and their unwillingness to accept that something in the game broke pretty badly moments after they arrived... I genuinely thought they'd be glad to know there was a "game issue" and I was basically disconnected from the game instance before I logged out via the menu. Nope.
Running into someone "role playing" as a total Richard Cranium is one thing, it happens, but all that other weirdness.. well I don't know what was going on. I assumed that perhaps their connection was just really bad, or their PC was perhaps a little weaker than ideal or, maybe, that FDev's netcode was having a bit of a wobble. It didn't occur to me that they might be exploiting something to cause those things. I didn't even realise that was a thing. People with invulnerable shields perhaps or whatever these "cheat engine" things allow people to do - I've not a clue, though I've tinkered with such things in the past NOT IN ED, but in single-player games like Crysis back in the day purely for lolz Though, being able to cause me to freeze in place, unable to even look at the ship's panels, while they teleported around taking no damage... makes me a little suss....but the game can be "quirky" at times, so, "role play" choices aside, I continue to give them the benefit of the doubt.
I know I rambled a bit there, but that one experience is what finally ruined Open for me. All because one person in a PvP build wanted to kill the guy in the empty trade ship - it wasn't even legitimate piracy. Were they using external "cheat" type tools to aid them? I don't know, I didn't think so at the time. However, several people suggested that their was something fishy there... and not just your regular networking gremlins.
Sad to say, I've not been in Open since that, it was just the last straw for me. A horrible game experience when I only had a limited time to play and a set task to complete, just outfitting a ship. Quite happy in Mobius as I like just seeing other players flying around doing their thing, but not forcing me to be their entertainment, ruining my plans for my short windows of play time. I LOVE the cooperative interactions I've had.
As an aside, I thought I'd logged in to a Private Group at the time of that incident, so I thought it was just a friend messing with me. Only when they opened Fire did I finally realise, then there was a moment of "You can't do this in Mobius!", before realising I must have gone Open by mistake lol. My bad for that bit.