You're forgetting the argument that the AI was simply pushed too hard. It makes more sense if you consider my perspective.
I mean, let's be real - you're talking about being in the best combat ship in the game, bar none. Multirole loadout or no, it has enough utility slots and internals to fit plenty to be "combat-ready" unless you're intentionally going all cargo racks with no shields or weapons, which clearly would rule out being multirole (or sensible).
If you weren't able to clean the clock of any potential opponent with such a ship, I would start to question the sanity of the game designers.
You have achieved the best and the greatest currently available to us. Enjoy it as such, rather than expecting fights to feel like you're still struggling to make ends meet in a Cobra III - or just hop into said Cobra III and get the thrill again.
Have some real-life evidence of these exact things:
One-armed swimming used for professional training: https://www.youtube.com/watch?v=80-7b9Io95w
Three-legged soccer, clearly doing it for "fun" (isn't that the whole point of all this?) https://www.youtube.com/watch?v=JKnjIr2_dOM
Wiffle-bat hitting a baseball...okay, you'd have to artificially cork the bat, but I mean...it's possible. People do enjoy wiffleball, at least.
Yup, the corvette is fantastic, don't have any issues in my FAS, or my Asp or my Viper IV either. I wouldn't fight everything in all of those, but I'd give things a good go and I haven't had a problem getting out if I ever needed to no matter what I was in or what was interdicting me, the AI was flat fine. There was AI suitable for almost everyone, really easy low grade AI, tough high grade AI and average middle AI, and it was all easily escaped from. But we had to go cut the top off the tree because people that got frightened in the top branches decided no one should be able to climb that high, so thanks. As to your second part...ugh...just...ugh.