Why are vizards so high and mighty again? They're exactly the same as arrancar, merely from the other side. I mean, if we're going to be barring vizards, why not arrancar as well?

Well, I shall explain again. Arrancar get 2 releases/forms - Resurreccion and Segunda Etapa - while a Vaizard would get three - Shikai, Bankai, and their Mask. They're high and mighty because they get three releases. And if you're looking for the differences between the two races, there are plenty; Vaizards, at their weakest, get three forms, mentioned above. Arrancar at their weakest get 1: Resurreccion. Vaizards keep all the powers of Shinigami (Shikai, Bankai, and Kido) while also gaining the powers of Hollows (Cero and Masks). Arrancar, on the other hand, get nearly none of the powers of Shinigami. They look like them, sure, but they cannot access any Shinigami powers. Their "releases", which are supposed to be them mimicing Shinigami, make them revert back to their hollow powers. Theres quite a big difference between them, but like I've said before, the power differences between races are only bases; A human can be just as strong as a Vaizard, given they train enough and get their stats up.

Alright, except your wrong. At their weakest, a vizard has 2 releases. Shikai and Mask. An arrancar still only remains with 1, however, it's stated that an adjuchas level hollow on it's own is strong enough to fight a captain on equal terms. With that being said, and the fact that almost all arrancar are of adjuchas rank, does a shikai+mask vizard instantly equal Captain level?
The only true thing that vizards have over arrancar is Kido, and let's face it, with custom ceros, Kido isn't exactly a game-winning denomination, is there?

You're missing the point, Uru. Power isn't determined solely by releases; we have the stat system, which we use to gauge power. A human without Molecular Overdrive who has maxed out stats is theoretically on par with a Vaizard with maxed out stats. However, we know this isn't so because while the Human would use their powers, the Vaizard would utilize their shikai and eventually their mask, and maybe a bankai if they have it. Obviously, the Vaizard is stronger, due to all the releases he has available. You release and obtain more of your power with each release you do, so its quite safe to assume that the more releases you have available, the stronger you are. Vaizards are by far the most powerful races in the Bleach Universe, so making them even stronger isn't very fair. Ergo, they shouldn't have Royal forms.

But releases actually weaken the species. Think about it. Would you rather have to release your power periodically to use a technique, or be able to use it straight off? Just by sealing your power does not mean you're stronger, ESPECIALLY because we have a stat system. The only thing releasing does is give you a small transformation and the capability of utilizing several techniques. I don't know about you, but using those techniques whenever I feel like it is a lot more 'powerful' then having to don a mask.

Sure releasing makes you seal your power in more sections, but to have the power to seal means you have to be of a certain base power, which would make you stronger than someone without the release regardless. But who seriously RPs that way? If I have the stats, I'm using them, regardless of my level of release. If I release into a higher state, then I simply gt stronger. I'm fairly confident that most people treat them that way as well. It just isn't fair for someone to release 4 times, which is completely unrivaled by any other race.

If my reiatsu is 40, and yours is 40, but you have to go through three releases to get full power, and I don't need to go through any, I would be 'stronger', would I not? The point I'm trying to make here is simply because they have a lot of releases, and possibly versatility, why do they hold the rank of the Best? They aren't even considered the best in the manga. There is no best. It's the strongest that's the best. I'm not even arguing about giving them four forms. That was never my issue. I just don't see why they're deemed the best out of everything just because they have a pretty mask.