Electro is a trash element. All of its characters are good despite having Electro.
Knockback is garbage on Electro as almost all of its characters are melee dps characters.
Keqing prefers to go pure physical. Her ult is weird and can screw you over with the camera, her E is mainly for repositioning, plunge attacks and exploring.
Razor is basically the Fist element considering his E and Ult are shitty.
Beidou is meh, but her Meliodas mode can be pretty fun. She's pretty bad without her constellations, however.
Fischl is an auto turret thanks to Oz. She's also a machine gun on PC if you know how to animation cancel thanks to her Atk stat.
Lisa is nothing more than a combo character who needs her C2 to not be a glass canon. She requires a lot of setup to pull of her monstrous damage capabilities which require pulling on the standard banner alot to tap into.
Don't get me wrong Keqing and Fischl are great, but Fischl is a subDPS/support who spams Oz (relies on elemental mastery to function) and Keqing is a charged attack spam bot due to being a critical hit monster.
Fischl is best at C4, somewhat doable with enough grinding if you're f2p. Her best weapons are The Stringless and The Prototype Crescent, somewhat f2p friendly.
Unfortunately Keqing requires a Credit Card to function at max capacity, she needs the Black Blade as it is her best weapon.
-----------------------
Geo's buffs are really good.
Shields are no longer just a crappy second health bar. They are now a damage buff that combos with geo damage.
Geo is slowly creeping up on Anemo for best support element, which is surprising considering Anemo is just Venti (wtf levels of stupid), Sucrose (ultimate support character) and Jean (jack of all trades glue).