There seems to be a lot of misconceptions about two Spider-Man villains: Shocker and Rhino. There's a lot of false information floating around about Shocker's tech, and there's a plethora of opinions about Rhino's combat effectiveness and intellect. So, here are the basics and hopefully this thread will help!
-His armor-When Herman built the vibro-gauntlets to project blasts of concentrated vibrations (note: NOT electric), he needed something to protect his own body from the effects. The armor itself isn't what makes him so durable, it's the vibrational shield it provides. This isn't some large bubble like Magneto can produce, it's a thin layer surrounding him. This shield has proven effective enough to protect Herman from Spider-Man's superhuman strikes and even a sniper rifle round. The heavy caliber round deflected off of his back, but it's important to note Herman questioned how much more his armor could take. Therefore, it's possible a few higher caliber rounds can bypass his shield, but this has never been proven. We have never seen how the shield holds up to cutting/stabbing damage, so that is also up for speculation.
-His blasts-As stated above, the belief that he has an electric based attack is false. It was earlier in his history that Shocker was able to control the power behind his blasts. He could make them weak enough to KO a person, or strong enough to destroy a bank vault or "turn a human's bones into jelly." The latter has never actually been done in combat. As expected, he can fire two blasts, one from each hand at a fairly rapid rate. I don't recall him ever overloading or losing the power from firing too frequently. While he's not especially accurate, he has tagged Spider-Man numerous times throughout his history, which is likely a credit to the frequency of his blasts and their speed/size.
-Other-Herman is a gifted engineer with no real large scale objectives. At the end of the day, he's often driven by lower crime goals, such as robbing a bank. While he was briefly taking a turn to the anti-hero side in Spider-Island, that was short-lived and he'll later appear as a regular in Villains for Hire.
-Physicals-It's a common misconception that his exposed face is exceptionally weak. While it's true he's obviously less durable than his armor, he's still superhuman without it. It's a weakness, the theory that a peak human could easily defeat him by connecting there once is not true. It's also important to note he has an immunity to gas, as proven when Scoprion tried to use the method on Rhino and he simply taunted the fellow villain. The notion that he'll lose by charging and getting stuck in an environment is unlikely at best. This happened once in his earlier appearance and he broke free from the wall. While charging, it's estimated he can run 100 mph. Aleksei has superhuman stamina, so the belief he'll quickly become exhausted is also false (like he did after taking a few swings at Captain America). At his best, he is indeed capable of giving Spider-Man a good fight, but Spider-Man's vastly superior agility, variety of webbing and more has also allowed him to quickly end encounters with him. He's not sporting 100+ ton level strength like characters such as Colossus/Thing/ect, but he's instead in the 75-80 ton range (last I knew).
-Intellect-It's a common belief that Rhino is a flat-out idiot. Titles like Punisher: War Journal have portrayed him like this, but there are just as many, if not more, proving Rhino is average in that regard. So sure, there are some showings where he's a complete fool that can trip over his own foot, but those are outweighed by the ones showing he has a normal level of intellect.
-Jobber Aura-Unfortunately, Rhino is more-or-less the Killer Croc of the Marvel Universe. Rhino has KC completely outclassed in physicals, but the notion of the similarties is that he's treated as a jobber by many writers. Just like the part regarding his intellect, he varies in showings. Sometimes he'll get credit from Spider-Man and give him a hell of a fight, othertimes virtually anyone can get him to fall overhimself. Simply put, while he's not even close to being one of the most powerful bricks, he's well above street level and it's a total mismatch when he's placed against characters like Nightwing/Bane/etc. Simply put, he'd one-shot them. However, there are obviously expections with characters like Wolverine (who can bypass his durability with adamantium claws) and Cyclops (powerful enough projectiles).