Are the rumours true?

Is Riven looking at a possible nerf? Is she considered really OP?

Where did this all come from?

My thoughts:
Personally, I think she is fine. She is strong, but not undoubtebly OP.
I went over the numbers last night as her HP/5 is slightly higher than most Top laners, and that a small increase in her Base HP could nerf the HP/5 to scale on par with everyone at Top lane.
120-180 HP in 1 minute by 10HP/5 per 60 seconds, but increase the base HP to scale her HP/5 per level to "fit" with the rest of the Top laners, as seeing this was frustrating most people.

Q= Not really as a reliable source of MAIN damage late game, more of a passive procc'er. Sure, early game it does a lot of damage, but you find more power with AoE stun. Not extremely powered, I find it balanced.

W= A quick powerful, AoE stun. This is probably only Riven's main source of damage and sub-par utility. The scale of 170 (full level) (+1.0) full attack damage, makes up for how poor the end of levelling scale is. 170 is not a lot of damage, and often people will negate that with the use of armor. I find it balanced.

E= Ah, the beloved shield. Scales with 1.0 AD. This is her utility. You may think this is just another excuse for an AD bruiser to go untouched, but really it isn't. Take Olaf and Irelia for example, Irelia gains life off her W's passive, and her ult. Her sustain is infinite, while Riven has a short cooldown shield absorbing damage. Coincidence? Hardly not, Riven has no form of sustain and that's probably why her HP/5 was brought up. Olaf can sustain himself too, Riven's shield is reliable of course, but the possibility of forever having Spell Vamp and Lifesteal balances this whole process out. Riven keeps her HP/5 high, squishyness and a tanky shield that scales with AD. I find it balanced.

R= A high damage, multi target skillshot nuke? Fairly strong late game, but is only reliable in the term of building strong AD. It's early game is sub-par, only reliable for those finishers. It's like Garen's ultimate, except a tad stronger. The process of building strong AD is fine, but is more like a glass cannon (sort of) I'm not saying that she cannot be built pure AD, but to add to her tankiness it required with some defensive stats. Of course I build Riven as a fairly off-tanky bruiser dealing high amounts of burst damage and so do many people.
I find this to be strong late, average early= Slightly OP and balanced.

Riven is a high-mobility AD melee bruiser dealing high amounts of burst damage. She can negate damage, as well as take it very fast. here are a lot of champions that can feud 1 v 1's with Riven all game, it all really leads up to skill and knowledge of the match up.

Some people have been telling me, that she's a nightmare. She isn't. Sure, you may get worried about versing a Riven top, but don't.
There are NUMEROUS times, where I've demolished a Riven and demolished as Riven.

It's about knowing how to play against her, her tactics, everything. You need to know how to go up against somehow who is blatantly called the "Top lane trouble". This stereotype is pretty off, and there are many ways to shut down a Riven, even if it's not killing her.

So, just to clarify I find that Riven is: Balanced.

Riven needs more counterplay top - While she's theoretically balanced in terms of effectiveness - the Riven matchup with many characters is simply lacking from an interactivity standpoint.

Although, this is true for a lot of top lane currently and it's part of a larger top lane sweep. Malphite/Jax/Irelia suffer from similar problems.

It's all very experimental at this point though - it's just that player skill between the top laners should be more of a factor than jungler assistance.

They were created for each other.

I doubt they're OP - I simply doubt whether or not they have strong interactive elements with each other. There's really not a whole lot of weaknesses in a lot of top laner kits to exploit or overcome - and so top lane is kind of generically bland and devoid of a lot of player skill investment.

Top lane skill right now almost entirely derives from lane management rather than champion finesse to a certain extent - game centric skill has overridden a lot of matchup centric skill.

pls don't **** up riven.

any buffs for darius coming along mister RED?

maybe make him tankier than mundo with full build at lvl 1 and make his ult instantly kill someone nomatter what hp there on?

Top lane is the only lane where I feel things really get out of hand. If I die to my opponent in mid lane and fall behind I can usually pick my momentum up if I play right. Same goes for botlane. But if I die in top lane or my opponent gets first blood on me things seem to spiral way out of control faster than any other lane.

That might just be the situation of melee vs melee (which top often is) and how hard it is to farm as melee when you fall behind.

I should have clarified. I meant OP in the sense that a few select top laners (of which you already mentioned most) seem to be superior to every other potential top laner, to the point where if you don't pick one of them, you are risking to lose your lane.