Here's the full fight:

dmichellewrites.tumblr.com/post/151109431416/amell-daily-superhero-fight-club-20-trailer

Indeed. I only wish we had a crossover with all the superheroes.

That actually has been changing in the last year or so, they have had a shuffle in the creative staff (Geoff Johns being named head of the DC extended universe) and that has allowed them more freedom.

Since these new appointments Supergirl in now allowed to use the Superman character properly, Deathstroke may be showing up again on Arrow.  So they are getting better.

Well, well, what have we here?

We got another great moment from Supergirl last night when Jimmy goes to the DEO to get his suit from Winn. A strong performance from Jeremy Jordan, who reminded us of how important "sidekicks" like him are, that making all the gadgets our heroes use is hard work, and that when the guy who designs and builds all this fancy stuff tells you something is not ready you had better listen. I think the scene would've worked even better with someone like Supergirl or Superman, as they tend to think of themselves as invulnerable. I believe this is the first episode (or one of the few), of any DC superhero series, that explicitly says that "sidekicks" are heroes too.

Here's the scene in question, if you're curious:

Yes, to the first part; she doesn't steamroll her enemies. Kinda to the second part; sometimes she appears more nerfed than she should be, but you could chalk it up to inexperience.

Supergirl, I wouldn't look to Batman v Superman as an example to follow (e.g.: Kryptonian security systems).