"Xena" has become the short-hand label for a type of sword-wielding, kill everything, usually hates men, WARRIOR woman. When people say they're turning Wonder Woman into Xena-lite, it's more "what a bunch of male writers who never actually watched the show assume Xena was."
It is a disservice to the actual Xena who was capable of humor, warmth, and compassion. Honestly, from what I remember of the show, she was most likely to use hand-to-hand combat in a given fight.
Grant Morrison even brought this up:
"
My take on Wonder Woman is that I don't like to see the sword and shield thing. I don't like that the only way to show strong women is to make them Conan the Barbarian."
As said, it's a symptom of a larger problem with writers who think the way to make Wonder Woman strong or bad-ass is to stick a sword in her hand and have her kill things. It not only goes against what she's supposed to be and robs her of elements that make her unique, it's often as a flimsy distraction from the fact the writer has no other purpose for Diana.
Not to beat a dead horse, but we see this in Snyder's
Justice League. Who cares that Diana is effectively useless, she's killing things! That proves she's tough!