Now, cruisers have more guns than any other type of ship; that's a pretty clear sign that they are supposed to be using those to kill stuff, not just sit about healing things or soaking up damage.
U know those big guys from any mmorpg with insane muscles, crazy giant axes and not less intimidating spiky armors? I know, i know, logic says that they should kill faster than the skinny magical girls in underwear. But actually they only tank and deal medium/low damage (and save the girls princesses booty).
I understand this is not how we see ST on the tv, but clearly trying to port what a tv show/movie/book say to a game like this is not working at all.
And yes, is not the whole problem, but in STO the thin girls can do anything by their own, there is no need of the other guys.