IF you have the right consoles and the right skills your MVAE can be rather tanky. Especially if you keep moving. REMEMBER you can almost always get out of a bad situation which can save you. It will never be a Cruiser but it CAN be tough.
Okay....I have just one simple question, are all escort ships....this fragile? I mean omg I get blown up way to easily...how is this at all fair? I love my Multi Vector but omg, its destroyed way to easily D:
I get WAY more survivability off my Long Range Science Vessel Retrofit even when im not using the Ablative Generator.....
You need to adapt to the ship. I would advise you to use a hit and run strategy.
Escorts deal alot of dps and are faster then other classes of ships.
What you're not looking at, is how much faster an escort kills things than another vessel, and the fact an escort is able to turn its facings much more rapidly. If anything, I feel the other ships are underpowered, particularly for elite pve content.
You should try looking at builds for escorts, there's a lot of good ones here in the forums, and if you're lucky or rich, the Jem Hadar escort is a tank as well. I've seen cruisers more fragile than that little bug haha.