Coming from EVE, I knew right off the bad that no sensor recalibration time applied to cloaking would make it gruesomely powerful. That's okay, it's star trek, the Klingons have that as their defining schtick, so I knew what I was getting into. My experience in EVE has made me understand the roles of ECM, ganking, tackling, misdirection, and how to react when your ship is disabled. Simply put though, STO's pvp is far too fast.
Case in point, in all my tier 3 PVP matches, every single cruiser has reverse shield polarity, which is a neat skill with a rather restrictive cooldown, giving partial immunity for oh... All of six? Maybe nine seconds? Best ability ever, because under focus fire, six to nine seconds is far longer than you'd ever live without the ability to ignore energy damage, the healing is merely icing on the cake.
I'll confess, I'm used to getting the warning "Hey captain, you're being targetted, sucker! >

" for the 4-5 second duration it took to lock something in EVE before the **** hit the fan. Maybe my reactions are slow, but in STO, the first indication I'm ever being shot at is usually "X arc shields failing". Which suprised me at first, until I figured I could do the exact same thing to a klingon cruiser with a single shot of beam overload at broadside.
Red alert, damage control! Where are my armor hardeners, aggh torpedoes! Death follows almost instantly, staved off maybe a second or so if I manage to get engineering team triggered and frantically spam the "Reinforce X-shield arc" key while trying to hit every kinetic damage resistance buff I have, to the point where the global cooldown of 1 second between activating buffs and BOFF powers is contributing to failure.
Ground PVP is slower than ship PVP. This is wrong, IMO, if I wanted to react this quickly in a cruiser, I'd play soul calibur as Astaroth, or something.
Edit: I forgot, ECM (viral matrix) is death. Being unable to target or fire for 20 seconds was bad enough in EVE, being unable to activate *defensive modules* in addition to this, combined with STO's speed, is certain death. I am aware (and use) the counter, it works, but it is not useful enough that it will save you from dying if you happen to get caught without pre-empting it first.