Thresher is one of the ships that was considered garbage as soon as it was upscaled, and nobody ever gave it a chance. Turns out, the ship is actually surprisingly good. Just look at the comparison with a Typhoon, the second smallest cruiser in the game. The sizes are very similar, and this is the post-upscale version, so you can see why it was upscaled in the first place. It also has a normal armor and a very good turn rate. True, it lacks turrets, but no other medium cruiser is this small except maybe the Dragon one, and that one has 7 turrets. Overall the ship is pretty solid and I don't buy it when you say that it's "incapable of dodging fire", because then 90% of the cruisers in the game fall under that category as well. People just need to give it a chance instead of calling it trash for no valid reason.
Speaking from experience, I fly the Thresher. It's still very capable at its role, but the lack of guns and sufficient turret arcs means it's a struggle to survive and dish out enough damage. It might be able to dodge, but not on a level where it can dish out fire at the same time in comparison to the Typhoon or Dragon cruiser, and even the Kag', which is a really good ship I might add, would have no problem out-damaging a Thresher.
I don't think I was as clear as I could've been. It's not the fact that it can't dodge, but it can't fire both its Heavy turrets at specific angles, which greatly limits its capability in duels, and leaves the Thresher in more of a support role, unless you feel like rolling it and moving in a serpentine motion to be able to keep both cerbs on target, which can be a struggle for those who don't disable auto-rotate.
Like I said though, I'm going to give the power core buff a chance to see if it makes that much of a difference to be able to fire its guns longer, and I'll gladly get back to you on the results of that.