well it's a research you can avoid with base frigate, I mean they really do a good job those basic frigates .

Sorry my comments may be a bit sarcastic, I am really asking for help in finding what is their usage!

p.s. Why not have the basic frigate a lvl 1 tech now and have the corvet and scout as base ship? right now scouts are more effective as a rush ship then corvets, with the scout sabotage upgrade, you can use them to kill enemy structures at least and you need the 4th research station for the titan so if you rush scout then use the scout to cripple the enemy buildings forcing him to hunt down your macroing 5-10 squad scouts...

No way you can acheive this with the corvet right now.

Ah they are great scout counters...

The Advent and Vasari Corvettes are a bit more powerful in that they have more passive abilities - the corvettes for the Advent alone each have three passive abilities. Also, if you start out the game by building a military lab, you can just swarm them, making clearing out neutral colonies much easier.

I find corvettes to be very useful when combined with a large fleet. They draw a lot of fire away from the more important ships, ae good at eliminating bomber spam and are fairly cheap to replace. I kind of like them to be honest. They move in a funny way too!

They need upgrades for the corvettes.

Whilst we can't talk about specific stats obviouslly, i found the vassari corvettes to be in a much better place in terms of things like health, firepower, supply, and cost. They're weak enough not to tread on other frigates, but strong enough not to be blown away by an idle volly.

I'd really advise the devs when they start looking more fully at the corvettes that they use the current vassari corvette stats as a starting point.

Ironclad says they have plans for them in the next major patch, so we'll see how it goes from there.  Right now they are indeed garbage.