take a step back and do some straightforward analysis.
Frigates are obviously the military meat. they provide both the stomach and the muscle of the TEC armada, their focus is on damage and elimination of enemy weaponry.
Capital ships are about providing powerful backup and damage, including the marza incendiary shells and the Kol railgun. ships such as the dunov and the akkan provide backup while the sova is purely fighter support. these ships are meant to become the powerful forward weaponry of your battlefield meant to eliminate, enhance or protect key ships or broad forces.
the role of Cruisers is pretty damn obvious. their abilities are far more mundane than the powerful capital ships, however their relative cost allows far more of them to be produced making them perfect to spread ship enhancements over large forces.
I've really had it up to here

with the whining that "cruisers suck".
yes, they arent exactly offensive based. but if you are fielding them as forward forces meant to provide a stronger arm than your frigates, or a more mobile force than the cap ships, you are getting what you deserve!
if you use the cruisers correctly you will find that they are quite the godsend. just dont mistake what their purpose is and you'll find out how really good they are.
they are far from perfection, but when used correctly they are well worth the investment.