the issue I find is when a ship becomes effectively Jelly because then what's the point of that ship?
I've played a lot of games with 4 Interceptor lists, and they aren't jelly... They do quite well, assuming the other guy isn't playing a HSF list.
If a ship has a counter, that doesn't mean the ship is worthless, just that it's going to struggle against it's counter.
There you go!